Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d432ec3f718e97…

MALICIOUS

PDF

68.8 KB Created: 2021-03-01 08:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 532fb36e736a530a6e21c73f6d34c6ee SHA-1: 4568f9a373da733844fe733fd6cec64c91f4ec92 SHA-256: b1d432ec3f718e97e134f5defdfbda68a28d94009f57156785119941f0a49bd8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://bologen.ru/award?keyword=junior+technical+writer+jobs+near+me PDF link annotation
    • http://vixerixobo.22web.org/gerugambakkam_guideline_value.pdfIn PDF document text
    • https://lavovozanu.weebly.com/uploads/1/3/0/7/130739022/madivabu.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/9088252.pdfIn PDF document text
    • https://rufekelikofevav.weebly.com/uploads/1/3/1/0/131070689/fojimonumoladafi.pdfIn PDF document text
    • https://gozizakodo.weebly.com/uploads/1/3/2/3/132303179/wasidexasowonuwemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421339/normal_5ffbe2626a80f.pdfIn PDF document text
    • http://gutemelav.22web.org/77422182461.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/wurivuve/21379401973.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/79998184501.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/free_business_letterhead_templates_with_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/39872284045.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/50568313092.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/centre_de_formation_brancardier_ile_de_france.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/vividupadilu.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/cambridge_2_test_1_listening_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/81634719229.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/fesunuxaxabunalim.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/cdc_guidelines_for_malaria_treatment.pdfIn PDF document text
    • http://pupowupavil.epizy.com/monster_in_law_streaming.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/acer_laptop_cheap_price_philippines.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD055 5336 bytes
SHA-256: 133521b0dbc85e07257954e3f86d94e755ba445e6f14cb3b838848b663d0c2ee
font_01_sfnt_off0000e262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 10328 bytes
SHA-256: a1a1d2f464220a39b1d563a27ad2d29a5a94a4a0c73bfa64597979bb26ecb72f