Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d772e58ca47ee5…

MALICIOUS

PDF

166.8 KB Created: 2021-03-28 18:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ab4498777f7ec1d7139973ee5f5b950 SHA-1: 05ff23ee78b1e57abdfb710443eca97859b64bad SHA-256: 91d772e58ca47ee570013f8fa791597a77babbff0217187594126c22194acdf5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://gimoguvi.ru/123?utm_term=cf+auto+root+i9300+android+4.+3
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/6370479.pdf
    • https://cdn.sqhk.co/mopomotop/jhMnpjf/tekavokawimav.pdf
    • https://cdn-cms.f-static.net/uploads/4403806/normal_600ded18945d8.pdf
    • https://cdn.sqhk.co/dolitife/idjifbs/tidivojowujigijoveka.pdf
    • https://cdn.sqhk.co/xobakidanav/7gdcmTQ/t_mobile_black_friday_deals_on_iphones.pdf
    • http://jadebey-x.com/darabupomugiruzuvuxebaniv25dth.pdf
    • https://cdn.sqhk.co/xezalagefog/Tgjgjja/pixel_shooting_3d_hack_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4468289/normal_604cdf606d113.pdf
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/guwipirudapegix.pdf
    • http://russianpatentexpert.com/september_love_lang_leav_epub_freeltz54.pdf
    • http://csxmoney.info/how_to_adjust_stride_on_nordictrack_ellipticaliifzv.pdf
    • https://cdn-cms.f-static.net/uploads/4465151/normal_603fcf41a8faf.pdf
    • https://cdn-cms.f-static.net/uploads/4446264/normal_601605e5b288e.pdf
    • https://setasavapu.weebly.com/uploads/1/3/2/6/132683041/ketadug.pdf
    • http://verifiedbadge-lnstagram.com/coachmen_campers_for_sale_near_me0vi4i.pdf
    • https://kofoxutekibefa.weebly.com/uploads/1/3/1/4/131454286/soneruxolukerax.pdf
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fe64a21461e5.pdf
    • https://dulebepil.weebly.com/uploads/1/3/3/9/133999512/e3b2ac7b.pdf
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/susodizegowi-tosasi.pdf
    • https://cdn-cms.f-static.net/uploads/4450417/normal_602c762adf7f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0002574f.bin
5157a4e388443accf6567b4367828b90a32fbb3ad96f9f2f107431b8b1be1b32
pdf-font-stream PDF embedded font (sfnt) at offset 0x2574F 5180 bytes
font_01_sfnt_off000268fe.bin
37a9c7b14d1402637f6cb96cb7a143dcbe625eab6e250b5a8f4959ad2dcb1b1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x268FE 10456 bytes