Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f02ee8d5f392288…

MALICIOUS

PDF

123.6 KB Created: 2020-11-19 05:33:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7afd991c0f19d5cc7fc01c587837c7bd SHA-1: 4b725ef38f66ed15c11c77f94cf183c2a825ebb3 SHA-256: 4f02ee8d5f39228857f7c075c47274ea2eabf2607605eafd15d5679d824a7540
244 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting services or known redirectors. The primary malicious link, 'https://traffmen.ru/aws?utm_term=princeton+review+sat+practice+test+answer+key', is flagged as malicious. This indicates the document is likely part of a phishing or malware distribution campaign, using a link farm to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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/aws?utm_term=princeton+review+sat+practice+test+answer+key In PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/8573814.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://ribapapa.weebly.com/uploads/1/3/4/4/134479292/3819904.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/90b66.pdfIn PDF document text
    • https://wuviruwex.weebly.com/uploads/1/3/4/7/134766268/niwobudinorujelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5fadc214f3e52.pdfIn PDF document text
    • https://zopavuro.weebly.com/uploads/1/3/4/5/134584556/6288430.pdfIn PDF document text
    • https://bukemabo.weebly.com/uploads/1/3/4/6/134653237/rerafewusosoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_5fb563d51f79d.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/xujewonagamaxu.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/xijiserera.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/fugudizumegerazo.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/slither.io_hack_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/29620330191.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_off00019034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19034 5212 bytes
SHA-256: f30367e54fa40178d2685b22dc2e235d5128a5b367bc2b11e6891a9e580a8dc9
font_01_sfnt_off0001a21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A21D 12328 bytes
SHA-256: 631def012be905a29825dbfb17ae67eaba9cd5a796ce3aa63f6311cd27e5cb42
font_02_sfnt_off0001cbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBFC 16072 bytes
SHA-256: f3b752e25d2e3098dc5b351a512c5ca672d2b137fcb7ddb3f81b2384be51d5c3

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