Malicious PDF — malware analysis report

Static analysis result for SHA-256 c583b9bdc75b37a5…

MALICIOUS

PDF

71.8 KB Created: 2020-12-21 07:16:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5a4d38b2a79d6a60db4df1345151d92a SHA-1: 9f1d57b45c96afec88739d8ec21ac07618b3fe2a SHA-256: c583b9bdc75b37a57cecbca15015ad8a890ef84a495c97a03968a32a398a893e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 pointing to disposable hosting, suggesting a link farm or phishing operation. The primary malicious URL identified is https://traffnew.ru/strik?utm_term=white+sliced+bread+calories, which is likely used to redirect users to a malicious site or download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/strik?utm_term=white+sliced+bread+calories PDF link annotation
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/4757571.pdfIn PDF document text
    • https://vonipelimodaro.weebly.com/uploads/1/3/0/7/130738487/70f94a84f0.pdfIn PDF document text
    • https://rozemubopul.weebly.com/uploads/1/3/4/7/134719755/bozuxifiwumo.pdfIn PDF document text
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/sorilajumaxep.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/venemawuj-noxaropuneze-nabadebotisi-susetidor.pdfIn PDF document text
    • https://xeforosoxipu.weebly.com/uploads/1/3/4/9/134900432/judup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/039cd647-d7fc-4807-9fc9-f0461f6116c4/circumcenter_and_incenter_maze_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/biographical_essay_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c42bb4-b12a-4c4d-9147-d6802d1b1a0e/wakojitibilile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae089a0-6305-4d54-b181-239b3e104112/nukekubozasa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f06b104edf1d7780fa74/t/5fc43bf04e98326c02980711/1606695921900/mavuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e345cc3b-6c73-4ade-8bb9-c1687768af00/gimarezofis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f319ab79f442f229e2d8/t/5fc190cffa04221c715ab525/1606521041254/watch_steven_universe_movie_online_free_kisscartoon.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/miwasiwo.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_off0000db39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB39 5180 bytes
SHA-256: 18cbb413bbfd2e92f367392dc149bafeb68a188c3e1cf7f5c757de490517401b
font_01_sfnt_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 11008 bytes
SHA-256: 39f3fadd31bab293fb10af2d2ea3ecaed7e78b5b729c3ad7c5a7996869d21941

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