Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e3ea964b42212b…

MALICIOUS

PDF

86.9 KB Created: 2021-08-17 01:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: da80830b028d44a15f50a9cb6cdec45d SHA-1: 3ac7924ad19a0347b4a1a778247aee54fa4f7815 SHA-256: 80e3ea964b42212bb57433ff7d657d16f9d49c89c63782dc8b8b29faedb1a7b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to lead users to malicious external content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/eejdfijp3tc8gosgvsbdjqe0p1/8624795792.pdf In PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-6-17/20210617153220511131.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/1p6hb2v9dhv39n7ej89lf81724/gokifaje.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/jexaz.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b8c011cdc---16114215486.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/8165063713.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/50939084477.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e0b1ee4d9---gujiwisidewef.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/72032440756.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/sidaredomaduvafed.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/sefizibekixadigizosowe.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/8f7f02b352a80cf54c09c8a4f8b1fba7/xulowelotugepewe.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/89402416520.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae53ef5a7c4---91096462908.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6f5befecafbe4b666333feeab9024d39/fivuladiguzamewevepoto.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/mivufabenoxawuwotoba.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/30c233122605af5f5be381a18941eddd/zezokogosamodajara.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/28d8400hh6f095nsmmrkhjlotm/25894805909.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ab352q0q0b7if7r506tab8bua1/13776213121.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/33525151318.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/53311658525.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/dirurukofimupex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=where+can+i+buy+a+cheap+yorkie+puppyPDF 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_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001092d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092D 17128 bytes
SHA-256: 13d740ff7e73af1bdc5509f708624071d37cf73f62a546dd530d9aafe26d286a
font_02_sfnt_off000135e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E8 10600 bytes
SHA-256: ec19eb6c8cf323fcb203d0e138ba463a8e17f75298c49a889b07439e323e1b07

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