Malicious PDF — malware analysis report

Static analysis result for SHA-256 031e061f5ba46d52…

MALICIOUS

PDF

84.7 KB Created: 2021-02-14 06:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bf817d4659f6df37585ef3c7f30e0ca0 SHA-1: a70b4e3c43b2f4bfbe9dbb76868a381b5f15dc95 SHA-256: 031e061f5ba46d52fa54dd0f1e19be3a516a718db63331fa4903fd87037f353d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm for SEO manipulation or malware distribution. The primary URL, 'https://baarspo.ru/wb?keyword=c%C3%A1ch%20%20video%20ri%C3%AAng%20t%C6%B0%20tr%C3%AAn%20facebook', is likely a lure to a phishing or malicious site. ClamAV and ML heuristics also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://baarspo.ru/wb?keyword=c%C3%A1ch%20%20video%20ri%C3%AAng%20t%C6%B0%20tr%C3%AAn%20facebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369796/normal_6018f483da777.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/280683.pdfIn PDF document text
    • https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/gemisiv.pdfIn PDF document text
    • http://citimart.online/wesiregufexaxawerubv0k1s.pdfIn PDF document text
    • http://fitokaps.xyz/kings_of_war_historicalznu8k.pdfIn PDF document text
    • https://jakazopafekitab.weebly.com/uploads/1/3/4/6/134632018/80e7d6b.pdfIn PDF document text
    • http://boxberry-24.cc/50244133100n79p3.pdfIn PDF document text
    • https://butopejejix.weebly.com/uploads/1/3/2/8/132814220/5918414.pdfIn PDF document text
    • http://exemplpusj.com/movie_night_invitation_ideas113yk.pdfIn PDF document text
    • http://instapodarok365.site/57845362714w7nvn.pdfIn PDF document text
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/7109209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481994/normal_5fe2cba7a38b2.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/5718045.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/beats_audio_exe.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/kimeboxodujofovuzedo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD77 5668 bytes
SHA-256: f6247e9149e8ab7768420b59b39aec3f0ac074972db65007afef83a94320a0c9
font_01_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 21084 bytes
SHA-256: baed5ac108eaa490b251d76d9b645b23bb3cdf65bc6d7b6036efce8c901eb637
font_02_sfnt_off00011fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC0 16260 bytes
SHA-256: d82538e39f1b15c137a898f4ad3b7a96ccb3db9973bcc4e51ce934e2aba34da2
font_03_sfnt_off00013533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13533 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

Open this report in the interactive analyzer, or submit your own file for analysis.