Malicious PDF — malware analysis report

Static analysis result for SHA-256 944984a1403c6ca0…

MALICIOUS

PDF

71.6 KB Created: 2020-12-19 05:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 80c767b39ab3caac82a0c363e816ffdc SHA-1: 7d9690ec09bd3e75f89dba358e9dd135465e8f3a SHA-256: 944984a1403c6ca099d671ae21fd411602c48db4141eeca8e6503b86afa5a248
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The PDF contains a large number of external links, with one identified as a link farm, suggesting an attempt to direct users to malicious websites. The primary malicious activity observed is the hosting of a link farm designed to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://trafffi.ru/wb?keyword=domino%20line%20skopje PDF link annotation
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/e5ed941d1c5c2b8.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/kuxenuxoke.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/7607131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420612/normal_5fd796e277732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_5fd3c9805d71c.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://uploads.strikinglycdn.com/files/656baac8-1c0e-4a72-91cf-eb0031df87dc/23920673102.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55d4d8ef7301f8b2ec065/t/5fcee91fcaa95a391e5ffa2d/1607395615686/92866460040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d80a82a-8bd1-4ae3-8b30-81853f75c1df/nordictrack_exercise_bike_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f38011-87a9-452c-b6d4-507a89b74f7e/pavetotifijufu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9f93f65a9a5fd492d713/t/5fdca3004ef20e41a29f7474/1608295168788/93684755889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b563f959-b5c5-40ea-9364-fba9ceeaac45/95970042468.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5558a405d5340f34720b6/t/5fcbe0930814be4f73f5f5e8/1607196819845/sea_animals_coloring_pages_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089c9532-a75e-43f4-bb3f-0af54ad11e56/cse_20_ucsc.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_off0000b17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB17E 4504 bytes
SHA-256: 95c133c9646f6a07ee312301084896807275fafb74d092c25f3c7952d27a75c6
font_01_sfnt_off0000c0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A8 14120 bytes
SHA-256: 8a5f1492e62dea40177911401ff39f385c87a38f125397b653338cfd852bfdbd
font_02_sfnt_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 16204 bytes
SHA-256: 6ff35bbcdef839a823e086214e5d609f702bf6b4484614f6c4b824d32b7fcc76
font_03_sfnt_off00010159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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