Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7dd04dc01f2357b…

MALICIOUS

PDF

74.1 KB Created: 2021-03-01 03:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b818041cb1fedffd15f0fd0c27db8821 SHA-1: becdcd8e47e65d7bdfeab1fa06c2c890d0459994 SHA-256: f7dd04dc01f2357be9ea6e74d5bae544bf6214d91539709a93c1edb739c27ee5
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs, such as 'https://xezojetit.ru/wix?keyword=daikin+aircon+remote+manual', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=daikin+aircon+remote+manual PDF link annotation
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/kaner.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/dulekoda-pidawulan-rerufu.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/bUhijhT/gibolexusapim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_6030a50b8944a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_5fda2dc937d49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5fdc4410de688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407576/normal_5fca76c389c48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383577/normal_5fe532bf4db71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501514/normal_5fd860b24e115.pdfIn PDF document text
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/4425669.pdfIn PDF document text
    • http://womuwure.22web.org/to_be_simple_present_interrogative_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xilekur.epizy.com/sutitobofutedili.pdfIn PDF document text
    • http://detuzojezil.rf.gd/anathema_full_album_free.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/vofefurudifapemonewazedu.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_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 4832 bytes
SHA-256: a9c90d25c87e8750cbdc33db604aec1dff0ee13aa43b36b21d30b074aca0290b
font_01_sfnt_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 10408 bytes
SHA-256: b165f41964526c883f8c73f450a642e38e8e88a11a14e80d3a2afec616dd5ccd

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