Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a04171ecc12f127…

MALICIOUS

PDF

96.4 KB Created: 2021-09-17 05:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 1a0e402c4ea9f5df963c652dc42c1253 SHA-1: e6d69b45fb6e29172867d1a0945bc7d24b97b038 SHA-256: 3a04171ecc12f12752f305424da3b239375a153fd3a7513967bf29f7fad99813
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and link farm heuristics, indicating an attempt to redirect users to malicious websites. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common tactic of using documents as bait to lead users to compromised or malicious hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://garglob.ru/uplcv?utm_term=watch+step+up+3d+full+movie PDF link annotation
    • http://goodfortune.hk/UpLoadFile/file///28808672091.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/17190046642.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/77820416152.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/tuxevuvaz.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/613c719b3447b.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/wosibizogexopupijuzul.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/8180309768.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/35375092995.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/vupijubom.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/2dcf8d2e709547130aed693c6b9fb9ef/wusefarolofevim.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/14463996253.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/jasinarinijovinopo.pdfIn PDF document text
    • https://capitolmodels.tuzonanet.net/userfiles/file/gewelol.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/21555254786.pdfIn PDF document text
    • https://petek.biz/resimler/files/boxogexajanapaf.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/615acf844fcb8984d228230d3ae3e577/vigefigipaxad.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130c57f57b48---fuxuzetumopibedas.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/16980094762.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6f6cf1f3a250ddf81667f0542424e498/xudisexituledefufuxir.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/fodufinuponuwe.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/tariwuzomoritatikelal.pdfIn PDF document text
    • https://thehouseproduction.net/file/gufemajogaf.pdfIn PDF document text
    • http://capital96.com/userfiles/file/mupebewe.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/miloperixiduvojot.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013fe4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13FE4 17652 bytes
SHA-256: 1eb8debd27d1412377c1b6ba17f3bffc1c8cf9a0ee44287c2b5e45c6090fb60d
font_00_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 11012 bytes
SHA-256: 75d7231f3d6d5ea0913f26d2f213c20e05eff4dc5787362ff183a071aa3ad097
font_01_sfnt_off000112ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BA 17596 bytes
SHA-256: 83e0232d3149931aa969ecd133bed7aa161a53b1c1b7d0a85ae3d7ac2a1169ef
font_03_sfnt_off00015ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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