Malicious PDF — malware analysis report

Static analysis result for SHA-256 426189665c61e860…

MALICIOUS

PDF

75.8 KB Created: 2020-12-28 04:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fc698de48dcc653e15b3b7f3cb56d6f9 SHA-1: 161beaf73556c1aed2c21494e027950e0b5b4fd5 SHA-256: 426189665c61e8600fb0e383ddf696a132de351142f735f9e07447795c3dc67c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/strik?utm_term=vector+quantity+that+has+both+size+and+direction PDF link annotation
    • https://vapufubewadul.weebly.com/uploads/1/3/4/4/134485241/c511d75a091ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5fced78646425.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/delagawotid-zilenuwuje.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/jarupuvi_wubalejobiberi_tajoxagamak.pdfIn PDF document text
    • https://zinikedefi.weebly.com/uploads/1/3/0/7/130740178/wazoninatovinureduk.pdfIn PDF document text
    • https://zepudelewow.weebly.com/uploads/1/3/2/6/132682561/kuwogalanip.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/0cdd9050-062d-4b74-a5ff-42df6188000d/47070364769.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/akinatr_apk_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2d8c6b-d8b3-4ceb-9392-19c3c84eb899/gabawema.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/rimolodukaxodinoriwigod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9692ee23-33a2-4aa3-bba7-af72837ef29f/pbs_leasing_desk_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a33f81b-679f-4822-9100-3ae731aea774/lagulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b0abb7-1457-4e00-94f5-d380d79d0020/64662085812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df612ce5-a120-4368-8eb1-085a6276fadd/84570389006.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52D 5380 bytes
SHA-256: d864a6e358ab61cdaa10b5443d06e7a1aa2f3ca2eaae6472aa2c5c421f5d8f8a
font_01_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 10792 bytes
SHA-256: c628b9b759f745d64f9fea899b271602ea41b72715591e912bb7d1e902977fbc
font_02_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61

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