Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b07663d05d14cd…

MALICIOUS

PDF

67.5 KB Created: 2021-04-11 11:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 467a3dbfae72bd0d62d5405f82da3fe7 SHA-1: 24d63db5a791a212fd4d32f7912ca0df2d3aeccf SHA-256: 31b07663d05d14cdd6dc862d76d9da52036e3325609b5104e903039471d02811
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using a 'how to remove liftmaster battery' theme. It embeds a URL that redirects to a malicious domain, likely to host a phishing page or download further malware. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://soxebez.ru/strik?utm_term=how+to+remove+liftmaster+battery PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467561/normal_5fe084192f63d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_5fd170ad23d3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_600c0b0372988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401694/normal_603f4c54ce296.pdfIn PDF document text
    • http://dulomagukide.22web.org/zixugosukixuvuzurizefujud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_606c3c604403f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463808/normal_60224e3eb177f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387716/normal_5fef9c15be261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5fd80621c01a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_601b9e6eb7c10.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/kefefetafij/brasso_metal_polish_safety_data_sheet_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/bmat_2015_section_1_explained_answers.pdfIn PDF document text
    • http://runuvezufonesex.rf.gd/reflexive_pronoun_worksheets_for_grade_6.pdfIn PDF document text
    • http://votenumilo.rf.gd/tiruzitapamag.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/beethoven_sonata_18_henle.pdfIn PDF document text
    • http://varosuvavim.epizy.com/bepumujujavowo.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/german_regular_verb_conjugation_worksheet.pdfIn PDF document text
    • http://fafebexa.epizy.com/dls_18_all_team_logo.pdfIn PDF document text
    • http://fapiranug.epizy.com/qualities_of_a_good_manager.pdfIn PDF document text
    • http://zetomasiju.rf.gd/what_is_the_correct_equation_for_average_velocity.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/76953369675.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/96652116844.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC29 5268 bytes
SHA-256: 695993a40b8927591a40d8e8557f1a8117c26934a2eb8dbb81ee801d177cbc1a
font_01_sfnt_off0000de16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE16 10144 bytes
SHA-256: 02e78ef2087796687b8c98283ac788a163c6cfdb410991bbd2e65b8af37fd431

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