Malicious PDF — malware analysis report

Static analysis result for SHA-256 740737975b48d145…

MALICIOUS

PDF

75.3 KB Created: 2021-03-25 16:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b1f4820de9b4c87fbc0f7c949b9a087f SHA-1: 23034ae157a2b4afbb24d3f57d3008c8dade5839 SHA-256: 740737975b48d1456082826e57c9df0930fdd002cec6222a02fbfcf3192f74e2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm designed to host multiple malicious PDFs. The document body, though corrupted, suggests a lure related to 'Walgreens digital thermometer instructions'. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=walgreens+digital+thermometer+instructions PDF link annotation
    • http://nepatokada.mypressonline.com/kezelegefo.pdfIn PDF document text
    • http://wejnpowk.space/zuzukabitafzq0ev.pdfIn PDF document text
    • http://erogancolumbia.site/22590243437mjtvd.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwogoxozoxi/Hhe5jhX/random_video_call_online_website.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393016/normal_5fc8294d8e0c5.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/HhfgjeT/38283136289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496812/normal_5fcdc00f9b581.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xotomisen/viva_video_editor_pro_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/68137833167.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_2a52a947c55a4f5e804dd37813e5c47c.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_d8c88e536d04472fa07c4da460543d96.pdf?index=trueIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_e783846466104627a55015a8522fe4b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/how_to_connect_your_phone_to_singing_machine.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_6819d9f74ffd4141a8552562dbe0a38e.pdf?index=trueIn PDF document text
    • http://jewofeket.onlinewebshop.net/acheminement_vers_la_parole_heidegger.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/formal_apology_letter_for_mistake.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_b6f4f37dec7140aabed279077aca477d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazopaju/maguzuw.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE530 5364 bytes
SHA-256: bdd3d149b4bef4906a114f30009169dc7379582127615764e011472a3b9c4bd6
font_01_sfnt_off0000f74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74A 11456 bytes
SHA-256: 5741bd379f7e2d9eb016a3a802c0cc6cea686b2554da1750a030b55dedda58ec

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