Malicious PDF — malware analysis report

Static analysis result for SHA-256 530e763195e8a0e7…

MALICIOUS

PDF

78.6 KB Created: 2021-05-27 15:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 735d80d0bc121a2681804cadfb36b01a SHA-1: 2f52fa7845d434779f8386b2012504a390428447 SHA-256: 530e763195e8a0e7c777290dbd9f386fcbe3ef801aba593b2574dbc6d036a066
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farms to manipulate search engine rankings or distribute malicious content. The primary external URL, 'https://ponafet.ru/strik?utm_term=traducir+un+pdf+de+ingles+a+espa%25C3%25B1ol+online', suggests a lure related to translation services, which is a common phishing pretext. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=traducir+un+pdf+de+ingles+a+espa%25C3%25B1ol+online
    • https://pepigapipewoma.weebly.com/uploads/1/3/4/0/134000130/9182176.pdf
    • https://fuxopejebema.weebly.com/uploads/1/3/4/0/134018858/2a60ef5f2.pdf
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/tovofagogatejonidanu.pdf
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5ffb19f70269f.pdf
    • https://nukimaxirob.weebly.com/uploads/1/3/0/7/130776041/zawuworumawos.pdf
    • https://wojuguzibuliru.weebly.com/uploads/1/3/4/8/134896427/8546470.pdf
    • https://pudawiwut.weebly.com/uploads/1/3/5/3/135342926/gozidaki_ronuko_norepalivakele.pdf
    • https://fujelaxu.weebly.com/uploads/1/3/4/7/134704358/6959134.pdf
    • https://rawunawikurek.weebly.com/uploads/1/3/5/9/135967659/5568808.pdf
    • https://cdn-cms.f-static.net/uploads/4387031/normal_605fb86a5e6ab.pdf
    • https://cdn-cms.f-static.net/uploads/4386084/normal_605bc924d81ed.pdf
    • https://radunepik.weebly.com/uploads/1/3/4/6/134617153/xapuromuwoleg-jatel-luvekid.pdf
    • https://cdn-cms.f-static.net/uploads/4495059/normal_606b09ae3b457.pdf
    • https://cdn-cms.f-static.net/uploads/4446035/normal_605003c2af324.pdf
    • https://ruzudagozigiwis.weebly.com/uploads/1/3/5/3/135394236/pifututiba.pdf
    • https://static.s123-cdn-static.com/uploads/4483855/normal_5fe44fd25ecaf.pdf
    • https://belogakarukulu.weebly.com/uploads/1/3/4/5/134502602/wawav_seroneli_dajizeb.pdf
    • https://simogewijak.weebly.com/uploads/1/3/4/6/134642120/zotukixoxa_radebegebo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4734e7ec-7e3f-42b9-8854-53b399b64f06/15272970773.pdf
    • https://uploads.strikinglycdn.com/files/89f68e5c-7206-461b-874f-b49db2228f0b/excell_2400_psi_pressure_washer_parts.pdf
    • https://uploads.strikinglycdn.com/files/620d2a4b-b034-436d-9224-45f89723b698/13679478765.pdf
    • https://uploads.strikinglycdn.com/files/8d81485f-000c-4299-aba2-cd405d8c217a/xuxivovokojilezedupanaf.pdf
    • https://uploads.strikinglycdn.com/files/954d2b21-a7d4-4629-81aa-d21b58bc02af/gopirowetewogudiwa.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_off0000f120.bin
a610f29a46a625bfb088dbb0784b5c210244fe20761221aa31f997fc2f7185e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 5484 bytes
font_01_sfnt_off00010397.bin
910ffe8268c769e734412f0bacefeb5db06c3f33f68e83ffc1b5526febb36cd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10397 12248 bytes