Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c22ac2f4923376…

MALICIOUS

PDF

86.1 KB Created: 2021-03-20 16:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97103b71e20c969725b46c29737a91f6 SHA-1: ea1a1680ffa861a383c56f0dc0b53adcc2a0a573 SHA-256: 94c22ac2f4923376e4dfd8602d398857e0c66350fb8e76efc1fda09f10b296cf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, suggests a lure related to 'job abandonment letter template canada', likely a pretext to drive users to the linked malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/wix?keyword=job+abandonment+letter+template+canada
    • http://penafur.scienceontheweb.net/fovoboxefa.pdf
    • http://veselutut.mywebcommunity.org/19268171690.pdf
    • https://cdn.sqhk.co/gimanoretev/hjFigji/drift_racing_mod_apk.pdf
    • https://cdn.sqhk.co/suxumeva/eiaieie/racing_go_kart_tires_and_rims.pdf
    • http://figuxovutofid.mygamesonline.org/nenap.pdf
    • https://static.s123-cdn-static.com/uploads/4500425/normal_5fc57313b62f8.pdf
    • https://static.s123-cdn-static.com/uploads/4453342/normal_6006978155971.pdf
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/desusegiwogazasi.pdf
    • https://cdn.sqhk.co/dibirolinu/jhugejj/lifubazomere.pdf
    • https://kagozekexep.weebly.com/uploads/1/3/5/9/135956698/464f564.pdf
    • https://cdn.sqhk.co/parikozug/jblz463/navneet_arora_dds.pdf
    • https://cdn.sqhk.co/vavetiset/IhaaibF/can_t_hold_us_southend_gravity_remix.pdf
    • https://cdn-cms.f-static.net/uploads/4446494/normal_6049e7d8a208d.pdf
    • https://jososipiwudamuw.weebly.com/uploads/1/3/2/7/132740918/2af706d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_9ea595cea30c47beabcb651a55ab3c75.pdf?index=true
    • http://bixozebaxikapos.atwebpages.com/fowew.pdf
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_7ef874e6287b4c6d8064c49b94752241.pdf?index=true
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_7073399d78fb4bb18161d604f57a947f.pdf?index=true
    • http://kemesuxaw.myartsonline.com/tefit.pdf
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_3c5b863dc904424e85f6ef6c81035aa5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111e2.bin
f4e5ea77b22471f2bb7ce6ef56ebc6de5183186589215152a3f77b70b3ad141e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111E2 5172 bytes
font_01_sfnt_off0001235a.bin
30a096ac54279da194fc5b259310f4ded3896ad2b178af831c9a10d2d3fdda9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1235A 11352 bytes

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