Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de976e1b80de69e…

MALICIOUS

PDF

77.7 KB Created: 2021-02-28 17:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 930bd5097ba7aa60e37b014468b9af87 SHA-1: 13dc905a787eec362cc8ba3f2f62abd8da6fa5a3 SHA-256: 6de976e1b80de69e23b098de8ce08c58dec7e0d54d0ef2d424bf0d217d5db33a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, forming a link farm, with the primary link pointing to a URL that appears to be part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a field guide, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=audubon+society+field+guide+to+north+american+trees
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/2090362.pdf
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/jazuz_ladeg.pdf
    • https://toxosujaduwo.weebly.com/uploads/1/3/0/8/130874389/xojudokifisi.pdf
    • http://idealicaitalia.website/beats_studio_3_user_guide121j8.pdf
    • https://wigeludob.weebly.com/uploads/1/3/1/6/131636858/babudedakunomop.pdf
    • http://affilateapp.online/exploring_our_world_textbookeam65.pdf
    • http://magicwoolshop.com/31867998227ubwc1.pdf
    • https://dodukitomot.weebly.com/uploads/1/3/1/4/131407143/gidatozanuxipex-vuditelapof-potawowobe.pdf
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/muvel-denud.pdf
    • https://bumesusibob.weebly.com/uploads/1/3/1/8/131857970/5524043.pdf
    • http://soul-felt.com/4851835540553rov.pdf
    • http://maxidadikegi.iblogger.org/dear_mr_kilmer_friendship_sample_answer.pdf
    • http://qqkaxes.xyz/panasonic_kx-tga405_instructions29ked.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mixanaz/95460757418.pdf
    • https://s3.amazonaws.com/kijelopazekune/loporotirowafa.pdf
    • https://s3.amazonaws.com/biwuwukesazef/aqeedah_tahawiyyah_commentary.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_off0000f361.bin
fcc952e81aadb9ee1754747f90392400320e068a32bc9dfcd4ad58ec4f5b5eb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 5668 bytes
font_01_sfnt_off00010683.bin
1ac899639b988cc6e2b7b44c2693781ae7738f7955fb6d8bbdd8ba026ab0e443
pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 10080 bytes