Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed41bf49d9e73343…

MALICIOUS

PDF

92.9 KB Created: 2021-03-06 10:29:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9fd9e62907bb1d1b001c3abb9d79d88a SHA-1: 2adaeae853093029a4a138748eeeae1e331f5e64 SHA-256: ed41bf49d9e733430e5b3bb34cc1d21d2cd3dca7d3b1b7c98436279a3f8a7c21
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though truncated, indicates a lure related to 'Macbeth act 1 and 2 quiz answers', which is a common tactic to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=macbeth+act+1+and+2+quiz+answers PDF link annotation
    • http://lisuzigerob.mygamesonline.org/35866994484.pdfIn PDF document text
    • https://cdn.sqhk.co/nilulugaj/jWW9Gp6/49947477930.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/what_degree_needed_for_business_analyst.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuwimavez/O1ie4Nu/67106979718.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/jhcbih5/36431953187.pdfIn PDF document text
    • http://femovanisom.iblogger.org/gutomon.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/eFhaGZQ/powomumepamiwatavigi.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/2Gwohfi/42346968009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_b60e495ea3124626a79218bae65400b3.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_1310da305a824a428be72231e642a2b4.pdf?index=trueIn PDF document text
    • http://durafewiluros.epizy.com/brandenburg_v_ohio_case_summary.pdfIn PDF document text
    • http://seroroxunabolu.onlinewebshop.net/95411837049.pdfIn PDF document text
    • http://muguvap.epizy.com/free_bible_esv.pdfIn PDF document text
    • https://a7474f5d-6ec7-41e4-954d-8cb0a6a0c5ec.filesusr.com/ugd/b987d2_cb19011f191840eb9bd631b9f35da11a.pdf?index=trueIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_3ef68da07108403887155a7c6d1aeb0f.pdf?index=trueIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_2fbed22cf7164b7da660c7bd700f77eb.pdf?index=trueIn PDF document text
    • http://nibudomatimemi.rf.gd/43560155136.pdfIn PDF document text
    • http://natikopudidupex.epizy.com/batifin.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_5818f718f7b04fc28226897bb0b424e2.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_00a75718aadd4f9893367041b24e9568.pdf?index=trueIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_767e1c3af22f40a590ba8b85008d0a89.pdf?index=trueIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_cbd4b233c3994f44996aeeddbabd32b0.pdf?index=trueIn 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_off0001105b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105B 5592 bytes
SHA-256: a8a569220b5c800695ad3e9e3a38326a001e19bb4c4dde18aefc67a97b5e2544
font_01_sfnt_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 1624 bytes
SHA-256: f7c46864d2a2cdbc84aeddf5273081f51c6ba031876103fb77d9a199f7b3bc70
font_02_sfnt_off00012bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBA 10684 bytes
SHA-256: 80b769f84e96a525cde2af9478650822e19565c8a5b61e3ef872b35e3c4815e2
font_03_sfnt_off00015055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15055 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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