Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1e511c60a535e9…

MALICIOUS

PDF

75.0 KB Created: 2021-03-18 06:35:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8fb212cb67b3f39798b3559cbe7f660b SHA-1: 70062cb1882761073de4a266be3cb28c32251666 SHA-256: fc1e511c60a535e9682a39069f3d25c888038dfdb19a5056588b7cd475c2903e
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 0.9996

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
  • 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/strik?utm_term=normas+apa+para+bibliografia+ejemplos PDF link annotation
    • https://zugatesek.weebly.com/uploads/1/3/6/0/136082504/vefeweso.pdfIn PDF document text
    • http://reduslimitalia-official.site/710370761121a2c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365553/normal_6002775807c79.pdfIn PDF document text
    • http://normab-id.com/disbursement_account_shipping8xfbf.pdfIn PDF document text
    • http://supportcopyright.net/tifamadusepaxeu094i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481059/normal_602f4f3570d8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fde33663defe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366337/normal_60023e33a2bac.pdfIn PDF document text
    • http://topstop.site/tupipezorixedimawajazto.pdfIn PDF document text
    • http://acupofjacob.com/peavey_vypyr_vip_2_edit_softwarex25d0.pdfIn PDF document text
    • https://purubagenipobeb.weebly.com/uploads/1/3/1/3/131398544/zibemibip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418579/normal_602e9c30a71e4.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/d47934d7-7558-4517-a9df-b175ceab1bf5/mr_robot_complete_series_blu_ray_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98820b0b-0b03-4259-bad3-69ce9236b899/79747765474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6192bb4b-5864-4618-8cb0-f135fb76a556/logitech_harmony_ultimate_one_plus_hub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b6133d-6880-488d-9d0e-bced34778624/pupulugutujabulemaper.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/shark_navigator_dlx_upright_vacuum_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/animated_gifs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97039ecf-a813-4240-8c05-94c9648816e0/zufagalil.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/algebraic_equation_examples_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a950cc-1cb8-44cd-b5df-47d5b412ba2f/93652815503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909fb5b5-fef1-4dc6-940f-54b0b06b7be0/wolarititulijifafajijif.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_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 5408 bytes
SHA-256: 8acdac37e12433d751be19c4bca74bfeb56c177af79de28215346b31ca1f7bd8
font_01_sfnt_off0000f697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF697 11824 bytes
SHA-256: 1152ec3d5cd68485c26cf0d4bb6cad8d921b3755c07d3691bee8ec3656926b44

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