Malicious PDF — malware analysis report

Static analysis result for SHA-256 8610ac3f11e4b2ba…

MALICIOUS

PDF

71.0 KB Created: 2021-02-26 17:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e7979b4b4f66b6fd3acf40c659d4a143 SHA-1: dada8dedd555d4c90b50f78793dc7904bdd86457 SHA-256: 8610ac3f11e4b2baeda427b982e2041b3aff7cd816c3770064a4418e56511443
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or spam document. It contains a large number of external links, suggesting a link farm or SEO spam tactic. The document body, though heavily obfuscated, appears to contain search-related terms, reinforcing the lure to external sites. No scripts were extracted, but the presence of numerous external URLs points towards a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wb?keyword=dirt%20devil%20royal%20hand%20vac%20belt PDF link annotation
    • https://cdn.sqhk.co/nosimasiv/eiieYjc/mod_maps_among_us_for_minecraft_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/qLgeNhd/heart_atrial_appendage.pdfIn PDF document text
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/bexijuzewopiw.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/IpiaWuU/zujuvifisexowufised.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/rinesarisovaja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407998/normal_60079ab4835c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5fecef4e73eeb.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/jRIpdrB/64363390443.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/t7iijaR/25667919948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vazisi/90145800769.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/muromopoxulavegowojoki.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/rivizosen.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/filmywap_2006_bollywood_movies_hd_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/76252969393.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/slack_app_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/cubase_le_ai_elements_8_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/wahl_clipper_corp_stock_ticker.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/dsssb_online._nic._in_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD39 4936 bytes
SHA-256: de8101ac206f02a796b7baf997505cb0fca34ad582a1d48015a06cc98db60b50
font_01_sfnt_off0000ddfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFB 10164 bytes
SHA-256: 1cad8accb0c40e72d850f368eec313905857ca17f306cf573ede63cf1836c87f
font_02_sfnt_off000100c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C4 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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