Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b348bac7e7abbf9…

MALICIOUS

PDF

78.0 KB Created: 2021-06-13 00:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5eec2077b92a7efd79163a79688cb435 SHA-1: 313b372b71db027889b002305e21b086a0fee972 SHA-256: 1b348bac7e7abbf96aad55af01504d851b999304263ab187b3ea10619414dbc6
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a movie title, aiming to trick users into clicking the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crewmak.ru/pbw?utm_term=karate+full+movie+tagalog+version PDF link annotation
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/3043574.pdfIn PDF document text
    • https://zuvexege.weebly.com/uploads/1/3/0/8/130814851/lewedo.pdfIn PDF document text
    • https://wibosopepizasu.weebly.com/uploads/1/3/4/3/134332643/subagizukirugeni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417659/normal_5fe5b5341eea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_6038eab829104.pdfIn PDF document text
    • https://tuxugamupone.weebly.com/uploads/1/3/0/8/130873807/3733280.pdfIn PDF document text
    • https://rewazuxaroro.weebly.com/uploads/1/3/4/3/134341361/lanawa_jedevegujinigak_xexosipin_fowavazab.pdfIn PDF document text
    • https://widobane.weebly.com/uploads/1/3/4/3/134340358/1347924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fd38e61204b8.pdfIn PDF document text
    • https://pekixozere.weebly.com/uploads/1/3/5/3/135397988/bujavopevodulifejed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428052/normal_5fedac1865150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386836/normal_6000137a7dc18.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/5791023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418567/normal_6007b15aec6af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_60347cf76f697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_6039bf83452c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446151/normal_60c279b214945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_602ac282a4eda.pdfIn PDF document text
    • https://fuzujaloxoz.weebly.com/uploads/1/3/4/6/134684853/11867787381c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482618/normal_5fe1a438becc2.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4419451/normal_60b3fa80a44f8.pdfIn PDF document text
    • https://felefufo.weebly.com/uploads/1/3/4/7/134768155/jurilawu.pdfIn PDF document text
    • https://juloxiwam.weebly.com/uploads/1/3/5/9/135967800/noxamobisigukiv-jajewerotove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ed56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 5116 bytes
SHA-256: cc3b934c2d9a20a6a6c62524c1fa2e13e9ead09b55961218d504611746224389
font_01_sfnt_off0000febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBF 13368 bytes
SHA-256: 2e74a89671593b03777d6e1bbe65b201b8b93fbb1cbec454b10a5b3e7e0688c6