Malicious PDF — malware analysis report

Static analysis result for SHA-256 89dad252d3cd2565…

MALICIOUS

PDF

89.2 KB Created: 2021-07-28 06:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: db58085b242bc20fdec1e8e4f2ac8dd4 SHA-1: b6b0d2a0573c137ed40bc6ff08e38dcb74b68346 SHA-256: 89dad252d3cd2565738a8347e9a385f02f392038b75fffadacdd46c3bb202804
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used to distribute malware or conduct phishing. The presence of external URIs and link farm heuristics suggests the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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 http://bogaarchitetti.it/userfiles/files/13488529816.pdf In PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/69865893426.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c94a4b58c68---49541790819.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/70557960992.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607618fcc0a53---simomow.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/pubekaxuzag.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/cca1b4b5b884d5c71b9603a73016c73d/dowomibixakod.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3bb2ea61f---35179375842.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/75008665193.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/dokugi.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aafd3b27af6---38406937137.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/zikexedovutenugakalewojik.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/da91d244b4c94d39173d901023e8ff06/rarofagawufatumeludiwe.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/wudile.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/mcps5lse9dl1o5igpi9ecpd3c6/rorabofeperebeto.pdfIn PDF document text
    • http://hrudolf.com/userfiles/94979078961.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/lhf98gmaj2u36leqqcug8es5ji/67877284089.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c56f8f7b6---33952573930.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f9d82b634---80101213641.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/58683890469.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44878e0f90---93995092484.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16073275a52be7---welesigixajebofufunifenul.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/76306541906.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210620_2221F4CC99A9226B.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/sipotimedaronarigi.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd89a1ad9a---lafugu.pdfIn PDF document text
    • http://synphabase.ch/upload/file/69691924890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+write+an+appraisal+reportPDF 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_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 15944 bytes
SHA-256: 12bf050c223fb2d6c1bb8e240bda33bc02646c224e48a0605a1efd3cc4fd9f87
font_01_sfnt_off00012600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12600 10324 bytes
SHA-256: 14a3c24eeaec660d9feec3aa85020baaf655127ad3e38580860338c57cdfb61c
font_02_sfnt_off00013d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1