Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9610f1af690fc45…

MALICIOUS

PDF

86.4 KB Created: 2021-03-28 18:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 608dd2b8ec04d808425f6a6b77b9e854 SHA-1: a9e57782e7ccac80e11807dea7047132e29354a6 SHA-256: e9610f1af690fc4525d6ea8e2949b89e1a4783ec848dbec38602f3d2cb7799cf
156 Risk Score

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 0.9994

Heuristics 5

  • 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.
  • 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://midufefew.ru/strik?utm_term=vizio+d43-c1+power+cord PDF link annotation
    • http://vurovolapoza.mygamesonline.org/61595912997.pdfIn PDF document text
    • http://livecopyrightverification.com/pazoruzu66h3f.pdfIn PDF document text
    • http://martakkord.ru/jorge_luis_borges_vida_y_obras6jta4.pdfIn PDF document text
    • http://tapagigozi.medianewsonline.com/mini_dv_tape_repair_service_near_me.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/jvc_camcorder_cassette.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/dutuzanob/free_piano_duet_sheet_music.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_a1c385ca7c764d3a9a9b8a02a7a9cc11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/71193744244.pdfIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_0ae6fb44852c4720a1eeb6811b2e5a75.pdf?index=trueIn PDF document text
    • http://roveramo.atwebpages.com/pupuserevatopamim.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/pefomoduxifedadu.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/bezotigalu.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_e4451fbff6a2472d87d57bfa3060261c.pdf?index=trueIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_7ad3bb42c12d4a7eb6d0aeb69f072a31.pdf?index=trueIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_b3aa6c4a0f1d4a12ad8417448158416d.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_a8ee4d5ad9264ab78081f74ac027d3b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/rekugimaseji.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/dosidedixuve.pdfIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_2c67625a510a4b51b6c946423f2ef1db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/xijubirasovetajafojema.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/report_animal_abuse_in_indiana.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 2960 bytes
SHA-256: 3c6502e04658d985b37ed967139d4b1bb7136c1c8ff06868e6b64c17630b7d50
font_01_sfnt_off0000fd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1F 5092 bytes
SHA-256: 33cc522811c7ba3c3137fc4b707ca47af6ab830ef89002398c30b9e40607e219
font_02_sfnt_off00010ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBB 11688 bytes
SHA-256: cfe6dbf96fb01e711c7aad690534881b146fa33d9bfe8274e777d442fca90a27
font_03_sfnt_off000136ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AD 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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