Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73e1b4edc7670b4…

MALICIOUS

PDF

97.1 KB Created: 2021-05-12 02:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d6c19237424ef95e4b61df7106f2ff4c SHA-1: 7331f8d3927dd6c79f27c9822ffe9490b2254cee SHA-256: a73e1b4edc7670b4de6e0b11dab45222f395086657c0d4557527868311be424a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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://botokaw.ru/strik?utm_term=how+much+does+real+estate+classes+cost PDF link annotation
    • https://zazozoke.weebly.com/uploads/1/3/0/7/130776388/rotaletomuledalebeko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449992/normal_60595f3ee898e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_602063af2f1e8.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/where_can_i_watch_bosch_in_canada.pdfIn PDF document text
    • https://mafizawejibon.weebly.com/uploads/1/3/1/3/131383772/tepovivizipa-bisatovuti.pdfIn PDF document text
    • http://pezejij.mygamesonline.org/design_thinking_stanford.pdfIn PDF document text
    • https://vixananuxa.weebly.com/uploads/1/3/4/8/134881407/busodobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_603f5b7d3827b.pdfIn PDF document text
    • http://vigirorimikana.medianewsonline.com/geometric_sequence_notes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_25b266d0555546f6a8d09e3b278995fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/solutions_for_global_warming.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/metformin_pcos_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/how_to_pair_smart_plug_to_alexa.pdfIn PDF document text
    • http://fanalejowegop.atwebpages.com/workforce_diversity_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/setikerugotizezidiseg.pdfIn PDF document text
    • https://377d1c6c-8747-407e-9a0d-bb8234813250.filesusr.com/ugd/f0b1fd_086f5cd6e8bc4ab980ca0fbb53c3232a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/robotic_prostatectomy_video.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/what_choke_does_a_browning_a5_use.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_03ca068ed9324d849425616571e2ba51.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/how_to_tune_cobra_29_lx_lcd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13290 4960 bytes
SHA-256: b9857bd67aa93c71592735d523428660db81215e90e4a141ffc0d41cb7853891
font_01_sfnt_off00014379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14379 11080 bytes
SHA-256: 0f34d51c61e073cf0f35a9e3ea49055e62560422cd1bf6db5cd9b338b4bd41ba
font_02_sfnt_off00016934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16934 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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