Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a64ee4c4ee6da5…

MALICIOUS

PDF

137.1 KB Created: 2021-06-29 11:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3f17f7f8e9ccf954b3aad9581451325d SHA-1: 09d2f6ce7e71aa098a7aa57e0a17718b7ea5d0f7 SHA-256: 38a64ee4c4ee6da51a2dd2f4ca9d61ee5cb942502979696449cab59851da955e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of external links and the overall structure point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pistant.ru/uplcv?utm_term=manual+power+point+2007 PDF link annotation
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/ccd21493f5c6296b4393f3dbf5d56b2d/tesagididu.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607703599b9ad---regorabewabizipexotulenod.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/2qga6mgbb8vrlliijrfjk69okr/xudojarewakajamiba.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985cc4c187a---90076560034.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b53ed7d3b---56404771607.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/d5879dc49aa17c211da24b4ca5d86197/90164423433.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6436536671---gepatulesun.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/694drdcbtjuqoj62m5olvu3av7/67713944459.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/12182916708.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c642f82353---31483473056.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6e8c6a3f3---bowelupu.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8baf3d754c---29918296031.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/zijigavitew.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/9n436p291ev1algc83t03lbkn3/fozisonezero.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/nowutelevijawugikatatipe.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/alfgsq3nkjkeaiph9sbufe4ltt/28936997673.pdfIn PDF document text
    • https://hgb.se/filer/file/52518052778.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/nabozibejupitib.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/a02bk016913aik5l4edo4cos57/xurudibugaza.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bebef113455---88988535748.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/gelixu.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0bd46167f---kudirojaxoru.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d7cf2471456---24188999921.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b1483e86135---losobinerakimovenoma.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090599e181c6---zusufedix.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ece2373225bd1c89fd66c86c87251a26/nafinejexes.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/23639898517.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6C2 10548 bytes
SHA-256: 648977469737f6a0017d8a4489a5c4b00098f66985155926563da7b8dbb6b3e9
font_01_sfnt_off0001cf03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF03 18468 bytes
SHA-256: e655a0c7ba330491e1a8f2375b3ca724cdb44ee27c6a6f333c6f24d3c7f5b01e
font_02_sfnt_off0001fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1