Malicious PDF — malware analysis report

Static analysis result for SHA-256 812a831e681758af…

MALICIOUS

PDF

67.2 KB Created: 2020-12-23 04:26:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e759d42b3c2441399b85aee82f4bb9cd SHA-1: d0be59cd10cbecd4c73464125226048ab8536180 SHA-256: 812a831e681758af360c8e20c443ecf6562f600e62b32ff59d971ae7f8b78c15
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including a known malicious redirector and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of numerous external links suggests an attempt to direct the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=penalty+kick+soccer+unblocked
    • https://jaxuwigoba.weebly.com/uploads/1/3/4/2/134266140/3509436.pdf
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/2010460.pdf
    • https://bamaxasujobuz.weebly.com/uploads/1/3/4/3/134315865/rekajadakuwog_zilezekalivuro_nekigozanote_gufasonerezaxub.pdf
    • https://solezoxi.weebly.com/uploads/1/3/4/6/134654925/f9dd0f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zamemigojat/9609155934.pdf
    • https://s3.amazonaws.com/vufupu/same_side_interior_angles_theorem_converse.pdf
    • https://static1.squarespace.com/static/5fdc7d42ec98190d8a5337c0/t/5fdc93e7adf98e63306a81d5/1608291304638/wepajopelifig.pdf
    • https://s3.amazonaws.com/napisakaluja/faweguserinadavudumote.pdf
    • https://static1.squarespace.com/static/5fce631890e5b06becb75e85/t/5fcff62f6742965a9dec5f28/1607464498344/5257467858.pdf
    • https://uploads.strikinglycdn.com/files/5f36ec21-5e8d-4074-81d1-ad7de3dcd1d9/buncombe_county_register_of_deeds_recording_fees.pdf
    • https://uploads.strikinglycdn.com/files/e91c7931-5740-46e5-a36f-f1e7e5628f10/jifepajelejajanibuvutinu.pdf
    • https://s3.amazonaws.com/sakaburepagase/ata_2015_nodule_guidelines.pdf
    • https://static1.squarespace.com/static/5fc3ceaa24b06a7eb3118727/t/5fc7d5fc8927470b95c88c95/1606931966434/universe_sandbox_3d.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_off0000ca7e.bin
256cde3217c3a465d5f5cd7a789706e98d1dbe8e172432f805ab1d4f88d68560		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7E 5240 bytes
font_01_sfnt_off0000dc60.bin
9a80e59d9594e16434b313de239f96ff36394af85243cd4a227e1d29b9bfb306		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC60 10436 bytes

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