Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa56330c5484150…

MALICIOUS

PDF

74.2 KB Created: 2021-03-10 20:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bcee57b853c7f9044fdd42a11c5161b3 SHA-1: 80d06105541c1a69008c8e3fb9f078a29368a0b6 SHA-256: 6aa56330c548415094ebc4bee099a9da02cbd94f5d72f04641b2402d2909aec8
186 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 0.9996

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.
  • 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://baarspo.ru/wix?keyword=18th+street+lounge+history PDF link annotation
    • https://defosojuregoko.weebly.com/uploads/1/3/1/3/131383900/mikovigivo-rivisawuzeramew-vaxemavut-vomiw.pdfIn PDF document text
    • http://tuvawom.iblogger.org/insinkerator_badger_500_reset.pdfIn PDF document text
    • https://bigifami.weebly.com/uploads/1/3/1/4/131407708/sumepe.pdfIn PDF document text
    • http://topcreditreport.info/sojimefog5enqw.pdfIn PDF document text
    • http://digtalcaliper09.xyz/wizard_how_to_draw_heroic_anatomy_pdrxduv.pdfIn PDF document text
    • http://xbet1.fun/demedoxudefafosizemy22sw.pdfIn PDF document text
    • http://hdsamara.ru/kejukudofenefg61e6.pdfIn PDF document text
    • https://bukowimulo.weebly.com/uploads/1/3/1/4/131407836/5833738.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/tufenemo-gitiba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kowewewabozete.epizy.com/doderexomupolovafi.pdfIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_648f9a3425714f80a73cb9b90a4a87a1.pdf?index=trueIn PDF document text
    • https://058da8ce-bb30-4b8c-81eb-8903018cac65.filesusr.com/ugd/ab745b_5b3db48eb5c842e4ad15752449bdce85.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/leributafa/android_tv_box_max_pro.pdfIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_add712ae214540a7bb69726a9d92d62d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/41215d83-3d4a-46d4-8cae-e398e6eafc08/fematupejuzekab.pdfIn PDF document text
    • http://lugukejuraxa.rf.gd/28356937569.pdfIn PDF document text
    • http://wetoxisifogif.epizy.com/call_of_duty_game_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3add7b0e-b609-43f4-8c16-e60ec7b72e0c/squirrel_hill_theatre_showtimes.pdfIn PDF document text
    • http://vapedefomagejev.epizy.com/directv_remote_programming_guide.pdfIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_64e52b86d6924d14b25c120ba9b9130f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/email_newsletter_templates_ms_word.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_off0000e786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE786 4988 bytes
SHA-256: 55e2c5a471f52a46a0874582040a95e723bfa44573eaab4a6f542aaa1a1bb3cc
font_01_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 10204 bytes
SHA-256: 743d242234bd050f4db3668edd840f1b43f3eb1df1e734d79fce204a9cbce711

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