Malicious PDF — malware analysis report

Static analysis result for SHA-256 574e7e36d85c690e…

MALICIOUS

PDF

77.3 KB Created: 2021-08-20 10:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: eb1cbea455dd1443e6d3d3492a42a4c8 SHA-1: d0476b497aed66e319fdff0450181f84ce5e1fb2 SHA-256: 574e7e36d85c690e7a6e7d63c76beacad6bbb9fea5a00de18cf0b00ffd26cecb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple compromised CMS upload links and disposable hosting further supports this. No scripts were extracted, but the overall structure points to a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/ca1efd4c26409213b13e1f66b4a9a289/gusirijikaxa.pdf In PDF document text
    • http://suphammamnon.org/uploads/files/voxelofatesapezutix.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/bibopijapole.pdfPDF link annotation
    • https://hockeymro.ca/docs/file/66080635953.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c86a12de3d---jigevumen.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/96175162065.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/83089999873.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160899fa458253---543690952.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160827fe70eea8---86858136501.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/rofixal.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5mm5h76qjrcfrj1987jnmo64u4/wimurimikabodazaki.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8bee7f80bf95dda545149ea9b38c25cb/87153725619.pdfIn PDF document text
    • http://rld-carbon.ru/file/31349754680.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062721100965.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/boxetanajeworaviw.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/kefetefafatabadividetagi.pdfIn PDF document text
    • http://hkwwta.org/userfiles/pupixafukuxebunesikitoj.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085d1a9738df---56382506387.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/taviwakivirifusuwap.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf97f316dd---lalaxitimupibividebe.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/8297070921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=interpreta%C3%A7%C3%A3o+de+texto+tirinha+9+ano+com+gabaritoPDF link annotation
    • 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_off0000c417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC417 18760 bytes
SHA-256: 5fa8db658702db2814e7f0d6a05b30d87141bab151b57a6e52637617fd6caf09
font_01_sfnt_off0000f2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 11572 bytes
SHA-256: 2ab718cbe34b94dc3c0f1eeb460496ca839c0bcfda6f53a52daedeb5b6ea7286

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