Malicious PDF — malware analysis report

Static analysis result for SHA-256 37adbcc318d55f07…

MALICIOUS

PDF

79.2 KB Created: 2021-06-01 02:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b367f4d090c75064dea9e61509462270 SHA-1: 70ae5d19fc1e7c3ae672d9f48c7ef7572d1b3d57 SHA-256: 37adbcc318d55f07bbc948b1e35c2a306baf3091f5e689185c1a058c3909c084
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic findings reveal a PDF link farm containing numerous external URLs, suggesting an attempt to redirect users to potentially harmful sites. While no scripts were extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/pbw?utm_term=is+snapple+tea+caffeine+free
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/58ede.pdf
    • https://berigagagek.weebly.com/uploads/1/3/1/3/131384675/zuvibod.pdf
    • https://modurofeg.weebly.com/uploads/1/3/4/3/134376635/kuwejedes-lenetedulizer.pdf
    • https://xevulegefixos.weebly.com/uploads/1/3/4/3/134319246/3d7474a7fd59da.pdf
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/4980383.pdf
    • https://veraroligesabo.weebly.com/uploads/1/3/4/3/134377370/b7f156.pdf
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/ribudibi.pdf
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/muxewagasikasiledobo.pdf
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/d33233c9e.pdf
    • https://jajotijodagiwox.weebly.com/uploads/1/3/1/3/131384424/9c15eb0827f7a1.pdf
    • https://static.s123-cdn-static.com/uploads/4419198/normal_5ffcb8f09dad9.pdf
    • https://static.s123-cdn-static.com/uploads/4378618/normal_5fcdad8e55378.pdf
    • https://static.s123-cdn-static.com/uploads/4386822/normal_60010402816c8.pdf
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/397b0e7c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bb447973-5d22-4051-8364-74b3a356f5fb/javixojukor.pdf
    • https://uploads.strikinglycdn.com/files/9bb1e8f7-0846-4e4b-aa08-2523865de81e/international_lawyers_network_members.pdf
    • https://uploads.strikinglycdn.com/files/df06e2ad-2fae-440f-8a8f-931a0a271a5c/jikurapu.pdf
    • https://uploads.strikinglycdn.com/files/427352d7-6074-4498-a2ea-3251bf50557b/happy_endings_margaret_atwood_tone.pdf
    • https://uploads.strikinglycdn.com/files/06077070-7f7a-4faf-af08-c65feb2bd7df/63660561883.pdf
    • https://uploads.strikinglycdn.com/files/5828ee79-26c2-4417-97dd-cefaab53427d/89444920037.pdf
    • https://uploads.strikinglycdn.com/files/64b5e504-fdc6-4879-9cdb-71d32feae888/que_hace_un_mecanico_industrial.pdf
    • https://uploads.strikinglycdn.com/files/b554f467-8649-4142-b620-6055c093ffca/balogekezopavanopebajo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac2.bin
fa7ecff12d126caf740ac9f8ea9b04519d782598efbcdf443f0c6ac8011f5810		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 4944 bytes
font_01_sfnt_off00010ba8.bin
0ce498e67a6609008eaee7847b956c682781b6596247dd132e0e787d1e1907b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA8 10552 bytes

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