Malicious PDF — malware analysis report

Static analysis result for SHA-256 847cb7fe2c129734…

MALICIOUS

PDF

81.7 KB Created: 2021-04-01 05:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f57c6dab567afd0c79b3ce1a4527823 SHA-1: dfafe66cd761a18fbb6c88245e031348366dd23d SHA-256: 847cb7fe2c129734454a7a5608ae02e42509483a8bdbf9fdcf8ea0eb208e3a7b
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains keywords related to templates and downloads, aligning with a lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/123?utm_term=funeral+order+of+service+template+uk
    • http://coolvdomaion.online/ub_faeries_modern_guide0k2q9.pdf
    • https://voxuvuru.weebly.com/uploads/1/3/5/3/135390020/dda4d47c84c672.pdf
    • http://itfamily.info/87403482486bir9f.pdf
    • https://wusulanapezuvu.weebly.com/uploads/1/3/4/3/134325740/kuxipuwuro.pdf
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/kutusop.pdf
    • http://testertumentum.space/66756846426vfnwt.pdf
    • https://zomijozefabeten.weebly.com/uploads/1/3/4/6/134636393/7a31b51862.pdf
    • https://cdn-cms.f-static.net/uploads/4470405/normal_600e5a755fc64.pdf
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/loluvomemuduveli.pdf
    • https://jetebudatupa.weebly.com/uploads/1/3/4/7/134748577/jegez_xiworevuwa_kifema_rofanin.pdf
    • https://kovapuneluwaze.weebly.com/uploads/1/3/2/3/132302913/wagimenaforaku.pdf
    • https://cdn-cms.f-static.net/uploads/4452846/normal_6054e226f14a0.pdf
    • http://ital-girl.space/lcp_2_partse4z6e.pdf
    • https://suvamowifav.weebly.com/uploads/1/3/4/3/134351486/naxamid-nemiwusi.pdf
    • https://cdn-cms.f-static.net/uploads/4393189/normal_60192aac6ee62.pdf
    • http://premial.su/how_to_tell_if_you_are_right_or_left_handed_in_golfxx2l6.pdf
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/51beee0a15797.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0aeecce2-bdb9-433f-a4a2-fc1acbe40cbf/lowes_seasonal_cashier_jobs.pdf
    • https://uploads.strikinglycdn.com/files/aa01ec95-861f-46f7-a68d-691838c7cd08/how_to_build_a_bridge_out_of_toothpicks.pdf
    • https://uploads.strikinglycdn.com/files/6c1de70f-4a8b-4cef-af07-aca0798150d4/wilokepudawixupotesibuxek.pdf
    • https://uploads.strikinglycdn.com/files/c748b567-c344-4acc-a372-d7c8998b1c8d/44207434278.pdf
    • https://uploads.strikinglycdn.com/files/62d3e2fc-aedb-4d44-bbaf-bf5d850fe0d9/41405165117.pdf
    • https://uploads.strikinglycdn.com/files/2cb3d85c-b4ef-4599-a86b-8d31372ab7b9/dunkin_donuts_butternut_munchkin_recipe.pdf
    • https://uploads.strikinglycdn.com/files/7676386a-0f4b-46e1-9e2b-de9cbdc229e0/77189713204.pdf
    • https://uploads.strikinglycdn.com/files/4a2a2d58-69da-4a97-b6da-ddbad3f92198/jutoj.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_off00010256.bin
e1ac737339f329e52fa49e4409cfb6dadae0909f2df7a23abafb9bb57b238865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10256 5380 bytes
font_01_sfnt_off0001149a.bin
b53b4288b5058ab4e31d3655dccbba20301609ee165813402b1c95fb478ee1fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1149A 10732 bytes

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