Malicious PDF — malware analysis report

Static analysis result for SHA-256 067f6811513fe941…

MALICIOUS

PDF

84.8 KB Created: 2021-03-27 20:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0a45b2d943bca66802efe2e6e15e3b2a SHA-1: 0a04aa8f01f5ef0dd7ac266f7b995c54208a39f1 SHA-256: 067f6811513fe9412e0eae2fb5e96e3e810ff305f14d576610b1394a2f330d1d
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as a phishing threat. It impersonates the brand 'Instagram' and directs users to a redirector URL, likely to facilitate credential harvesting. The presence of embedded JavaScript, though not directly analyzed for specific actions, suggests a mechanism for executing malicious code or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vukedezesul.weebly.com/uploads/1/3/0/7/130776134/4d38cde189.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=gramblr+apk+for+pc PDF link annotation
    • https://cdn.sqhk.co/ratobomebal/fqMUihx/sedol.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/z5c8ici/27184659468.pdfIn PDF document text
    • https://vukedezesul.weebly.com/uploads/1/3/0/7/130776134/4d38cde189.pdfIn PDF document text
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/7cab309c1099.pdfIn PDF document text
    • https://jenifamizoj.weebly.com/uploads/1/3/5/3/135319667/xopewab-zumumujak-talewerot-tomelidavi.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/jgYbNjg/lemon_juice_bottled_lemonade_recipe.pdfIn PDF document text
    • http://titanovyi-filtr.ru/what_are_the_rules_for_positive_and_negative_numberszxqcd.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/2avjbic/phone_ringtones_free_download_naa.pdfIn PDF document text
    • http://myirn.icu/xirelerenarf6oqn.pdfIn PDF document text
    • http://graatorama.space/ziforoxudida671m.pdfIn PDF document text
    • http://megantv.site/the_wretched_of_the_earth_bookam0ks.pdfIn PDF document text
    • https://zoxofaduw.weebly.com/uploads/1/3/2/6/132683138/106383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gisipevuzugofij.epizy.com/introduction_aux_energies_renouvelables.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_031c26928d1c4880b2d4c9ed6858c4f4.pdf?index=trueIn PDF document text
    • http://kuleborujakojij.rf.gd/how_long_does_it_take_to_be_sql_certified.pdfIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_a3cfd37ee07a4f2f83d2d53c6328613c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidenigad/comparing_apples_to_oranges_idiom.pdfIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_ff27243735d44066b6c88733f91e8222.pdf?index=trueIn PDF document text
    • http://tufigeburevizi.epizy.com/zekisivefodewise.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/14733893581.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6B 5216 bytes
SHA-256: ba32a196261749da185b3547b2e7f558d6ef7028a949b078f3782034f1b7ede6
font_01_sfnt_off0001211c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211C 10992 bytes
SHA-256: 1c75286c9054926ba908646c06400a2b6eb0865304334fb2aaa50c46c3dffd55