Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22a00ac1ce5f84e…

MALICIOUS

PDF

88.9 KB Created: 2021-04-03 20:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f951f79e22626ba922a4704dc922be1e SHA-1: b13c91afddb0f1db427e6e96ea82acb51066a41e SHA-256: e22a00ac1ce5f84e493b0b9276582820c3ff6aa2ddc413863b9e116fb3e545a2
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with the heuristic 'PDF_SEO_LINK_FARM' suggesting it's part of a link farm. The primary URLs extracted point to potentially malicious or spam-related content, indicating a phishing or SEO spam attack pattern. No scripts were extracted, but the PDF structure itself is used to host numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/123?utm_term=cabaret+club+yakuza+0+guide PDF link annotation
    • http://levowiziv.iblogger.org/what_does_orange_light_mean_on_panasonic_tv.pdfIn PDF document text
    • https://devanuwi.weebly.com/uploads/1/3/0/9/130969177/f3045fb0676e5d0.pdfIn PDF document text
    • https://padobijitoxu.weebly.com/uploads/1/3/1/0/131070591/404be.pdfIn PDF document text
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/kabirubizorewelak.pdfIn PDF document text
    • https://kosukanawator.weebly.com/uploads/1/3/5/3/135304621/652881.pdfIn PDF document text
    • https://jajibesuwazigix.weebly.com/uploads/1/3/1/3/131383486/rewago.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/lorifumofelu/73266662719.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/platformio_atom_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/32270916012.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/ant_er_native_app.pdfIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_a8bc40fb14aa459fbad3fd6d947c32ed.pdf?index=trueIn PDF document text
    • http://piwumutix.epizy.com/calendario_octubre_2020_imprimir.pdfIn PDF document text
    • http://piwirapofo.epizy.com/jingle_bell_rock_line_dance_step_sheet.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_943a8cf645af464f8663998154a39f52.pdf?index=trueIn PDF document text
    • http://wanudozadix.rf.gd/84080177731.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_d2025bc0bdcf483c830d14092728ae20.pdf?index=trueIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_61d312b5e7974e2fb38e1451e674d90d.pdf?index=trueIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_02d0e782acac4ad89d57e589665a6288.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/ozone_500_bike_parts.pdfIn PDF document text
    • http://lojojibuz.epizy.com/mockingjay_anderson.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_7917ddcee9954387951e8f52c10c35fc.pdf?index=trueIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_3586d260a9ce49069ef15afcf471c40b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E95 5332 bytes
SHA-256: 7ce39602b266e3627ac24312b8f14acd7a0b1ffceeeb5a0a6c8f4414e7049826
font_01_sfnt_off000130d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D0 10856 bytes
SHA-256: 63bc7cf1705f0773d37e4a5f1d0cbf9b727c854b9934885e5bb99b1ecbd91589

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