Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d29c7bb093be5b6…

MALICIOUS

PDF

79.1 KB Created: 2021-04-27 10:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9042c1d52209dec95c93bb746700014c SHA-1: af950cad5d8e7a92e55707f9df3c9792a1f797e4 SHA-256: 8d29c7bb093be5b64c565994f5eac2a2f9f758688c3d231582787bc9482e8946
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO poisoning attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/strik?utm_term=how+to+desire+god
    • https://daputonekamipit.weebly.com/uploads/1/3/0/7/130775603/16afe2735d77b5.pdf
    • http://1xbets-reg.site/asus_tm-ac1900_specslc2sz.pdf
    • http://wonder-ita.fun/epic_conquest_cheat_codesbx1l7.pdf
    • https://wimetuzozafod.weebly.com/uploads/1/3/4/6/134604259/2775493.pdf
    • https://bepopasexib.weebly.com/uploads/1/3/4/3/134356469/5350763.pdf
    • https://lexolegav.weebly.com/uploads/1/3/5/3/135350326/vitigawowu.pdf
    • https://cdn-cms.f-static.net/uploads/4385848/normal_600b42e1527e9.pdf
    • http://tukazijib.22web.org/gimesibavusaxomef.pdf
    • http://vafakewa.iblogger.org/bongo_music_2018.pdf
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/8565091.pdf
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/finolivudabu.pdf
    • https://tipoxuxol.weebly.com/uploads/1/3/0/8/130814923/boguguzas.pdf
    • https://mabamakozipapap.weebly.com/uploads/1/3/4/3/134315796/5598481.pdf
    • https://cdn-cms.f-static.net/uploads/4500677/normal_606dd96956059.pdf
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/4765227.pdf
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/1b1cb70.pdf
    • https://cdn-cms.f-static.net/uploads/4459939/normal_605638b62246a.pdf
    • https://zitenimed.weebly.com/uploads/1/3/1/3/131383388/1113197.pdf
    • https://cdn-cms.f-static.net/uploads/4370066/normal_6049ef81ed1f0.pdf
    • https://debawusajatowi.weebly.com/uploads/1/3/4/7/134707072/vogixu-nojotetasugagib-nulapiwufadikim.pdf
    • https://badexakabenal.weebly.com/uploads/1/3/4/0/134017850/xanigudarede_pigodabipu_rofabejuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pijularof.epizy.com/miracle_box_crack_2._58_keygen.pdf
    • http://xubewabe.epizy.com/watercolor_techniques.pdf
    • http://vakisetituli.rf.gd/rasef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecba.bin
c073c9fe5b3f4487651f98736703f28698465735a5dab7c98080a9b0136fe02a
pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 4488 bytes
font_01_sfnt_off0000fc19.bin
51637156dfebb98eb1712870121d390a95401d04fd6c3a3a663ec7e95a736457
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 10952 bytes
font_02_sfnt_off00012104.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x12104 4324 bytes