Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef72bf4084f6aa4…

MALICIOUS

PDF

69.9 KB Created: 2021-03-21 02:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5b6205c8faf3f5ecc10d9b2f202f3f06 SHA-1: ee6f17b98bb7e6eab3f1bb1bdcbab788b07347d0 SHA-256: 6ef72bf4084f6aa4f886dd8be0928e201f457fb88e947e51fa14220818206c05
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to multiple disposable domains, and contains sequences suggestive of LOLBin execution. The document body, though heavily obfuscated, appears to be a lure related to a product manual, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://soxebez.ru/wix?keyword=fisher+and+paykel+dishdrawer+manual+dd603 PDF link annotation
    • http://pebunoguge.mygamesonline.org/gemorekewafumelinesoti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473963/normal_6000f65b516ee.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/digidozepesibowixano.pdfIn PDF document text
    • http://hot-money.fun/girl_jamaica_kincaid_storybrzps.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/iiXUYzM/vinyl_flooring_cost_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/embL68E/dopijes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490534/normal_60506bff1f1c2.pdfIn PDF document text
    • http://1eyvgo.xyz/depadobubimuzugidufafojubto2jk.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/dbq6ijz/copy_paste_tic_tac_toe_board_iphone.pdfIn PDF document text
    • http://nikecortez.net/how_to_curl_ribbon_for_giftspqg9g.pdfIn PDF document text
    • http://xijivedijimidip.mygamesonline.org/58231262986.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/hdcijWH/68920096671.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/temirikuji/1ihihgc/52055946650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_6024b992b3a55.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/iggdget/bhoot_wali_picture_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_603f1b36c7e9a.pdfIn PDF document text
    • http://montana-media.com/55335950099qo7tt.pdfIn PDF document text
    • https://cdn.sqhk.co/nafadurip/0hhjiaf/rare_boy_names_that_start_with_a_z.pdfIn PDF document text
    • http://dontbeshy.xyz/what_is_12_am_and_12_pmnnohr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446782/normal_604234dd60bbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459180/normal_60089d0ae49c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_604a8144f34b3.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/84524815857.pdfIn PDF document text
    • http://xijivedijimidip.mygameIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexefobixavater.myartsonline.com/jorujepusowufaguxaw.pdfIn macro / runtime command snippet
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B2 5872 bytes
SHA-256: 4a4d0280bd7587d92a7691e06bc7da18aeb34c38a1821c4e401c870c998c82f2
font_01_sfnt_off0000e7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A0 10148 bytes
SHA-256: 333aa7d15598211eeda3778d3904ffbec09332eb827adf18b0ffbb2ef7e134a7