Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee088f3693bcd194…

MALICIOUS

PDF

78.2 KB Created: 2021-09-24 14:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 089530ecac07f614d2e7ac62362ef8b6 SHA-1: 082b0cc4a8bb166f4717879a528c60a9309573e0 SHA-256: ee088f3693bcd1941af72875a5924214fba7ef9fc00e2aa42dd9ee481dfc7f0a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The PDF contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm designed to obscure the ultimate destination. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically identifies this pattern, indicating a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/e362es5e2dioktghlpsc4u9ci5/kitomitanubafovepos.pdf In PDF document text
    • https://vgk.tw/upfile/files/2021/09/21/73587150172.pdfIn PDF document text
    • http://landia-print.com/pdir/file/bisukipakunatefowu.pdfIn PDF document text
    • http://icoenergia.com/userfiles/files/zowuzewivukejedizogesox.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/zaperafaraf.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/refasuvibiwikakibi.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/1779688526.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/83348859610.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/gobazuzesevedumutit.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/xokurovimi.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/joxukipozojukujijolid.pdfIn PDF document text
    • http://image.dlib.vn/libedu/news/bachviet/20210920/file/nunasukede.pdfIn PDF document text
    • http://tuivaivietnam.com/uploads/files/soperifewupurusidav.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/64578147245.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/jeborazolinez.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/kawudelikewotazaposoto.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/tujajivadovixabofumaj.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/74350641411.pdfIn PDF document text
    • https://ms1oke.com/contents/files/9352800904.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/3278744326.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/luwunota.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/46122155218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=javax+net+ssl+sslexception+androidPDF 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_off0000c27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8F 21316 bytes
SHA-256: 2099612d519070a19c7d9a7b7ade6a512dd830edd00ffd49cd851d7726769d11
font_02_sfnt_off0001127b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127B 10664 bytes
SHA-256: d0b1e5f8f3b6a6409056a429886bff840e60c2859fdb95c1feb4dc2ca719d0d9

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