Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf5770aa47c361f…

MALICIOUS

PDF

99.7 KB Created: 2021-03-12 08:38:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 42550a01f5faa43298031a74b7c03c0d SHA-1: b37188ccfdf7f5e28130274904c21b9ea267db82 SHA-256: dcf5770aa47c361feccfd58d95c9ebb5a778bc2b3373a86e32f74211a62c7a42
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/wix?keyword=how+to+export+video+from+davinci+resolve+to+youtube PDF link annotation
    • https://lowobuganigazo.weebly.com/uploads/1/3/1/1/131163610/1438245.pdfIn PDF document text
    • https://vekiruwubutut.weebly.com/uploads/1/3/1/0/131070393/9959532.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/ejeghhe/bouncy_basketball_cool_math.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/dF4gdjg/xoxatifovikitizilonoju.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/xerujuged.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/2004_dodge_ram_1500_led_tail_lights.pdfIn PDF document text
    • https://lirukasuk.weebly.com/uploads/1/3/0/7/130739032/pivefitafewuw.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/vlnCfhe/80832536054.pdfIn PDF document text
    • https://bebefezagogu.weebly.com/uploads/1/3/4/3/134372182/3810979.pdfIn PDF document text
    • https://lubugidiwunop.weebly.com/uploads/1/3/4/3/134355153/bac6894.pdfIn PDF document text
    • https://tikiruwilowu.weebly.com/uploads/1/3/1/1/131163793/viwawalewuraj.pdfIn PDF document text
    • http://wotedogupowu.sportsontheweb.net/chemistry_an_atoms_focused_approach_3rd_edition_free_download.pdfIn PDF document text
    • http://nebofonuve.mywebcommunity.org/51682803380.pdfIn PDF document text
    • https://ximetekorexuven.weebly.com/uploads/1/3/4/4/134489871/bd156fb1a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f19eb3-da8f-49fc-b88e-fea259d9105e/defetudixinomun.pdfIn PDF document text
    • http://dibirat.rf.gd/soberomuxur.pdfIn PDF document text
    • http://nefaped.epizy.com/bhopal_shatabdi_platform_no_from_delhi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec2dd6d-f9bd-4f48-9f84-97e0bb76019f/podowow.pdfIn PDF document text
    • http://gafevudivexer.rf.gd/rafewapibogabariji.pdfIn PDF document text
    • http://kazizalogovake.rf.gd/tozezalebete.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/fixigowa.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_off00014695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14695 5724 bytes
SHA-256: 210b422c84773763bb2ce00faab16059ad743a5e9c8c2412c7ec59b3897956e2
font_01_sfnt_off00015a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A17 11776 bytes
SHA-256: 57ef1deb15528d707c4fed1ed2c5721e75f9c6491dc76a7de32083a90e380c31

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