Malicious PDF — malware analysis report

Static analysis result for SHA-256 f891140d271e0068…

MALICIOUS

PDF

106.3 KB Created: 2020-11-24 03:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: bba034fecdbe3f627b917ca63c9322a3 SHA-1: c2fb1b14a107c6c88468b57391df722b926b0702 SHA-256: f891140d271e0068aee52fc263bd2e2cdeb2ec978cfd20ecfc0403d32b092fd7
186 Risk Score

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://trafficel.ru/123?utm_term=volvo+s60r+manual+transmission PDF link annotation
    • https://kifewuwumezoduk.weebly.com/uploads/1/3/4/7/134740170/447814.pdfIn PDF document text
    • https://xumejiti.weebly.com/uploads/1/3/4/5/134529375/donomolik.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/3373854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f92563dc4b10.pdfIn PDF document text
    • https://wiwokuvivatazu.weebly.com/uploads/1/3/4/6/134629214/guwonozano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f922f21abed3.pdfIn PDF document text
    • https://sovewepipofev.weebly.com/uploads/1/3/4/8/134846449/099ce.pdfIn PDF document text
    • https://lefoxidegej.weebly.com/uploads/1/3/4/5/134526886/8ab8e99252be8ad.pdfIn PDF document text
    • https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/d04011fd7e.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/69dc78bd-ccc4-4f74-b36e-0ec95f61212a/21675599933.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/rubanodegukunik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64e6a82-a08e-41b8-b9b8-f36345655523/kenenakek.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/wexab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA9 5152 bytes
SHA-256: 053b633c140401c3dce2ee991bda10f6bfb36279003cd9bd13b3c9e45a14ebb7
font_01_sfnt_off00015e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E1F 12724 bytes
SHA-256: 420e63d030719c7f6195c853b9b85f7948a852950c2b6f2f95668f96ea74b0f5
font_02_sfnt_off0001873e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1873E 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c

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