Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ccdca0756c2e7a…

MALICIOUS

PDF

68.4 KB Created: 2021-02-24 11:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e1f636a253f354cdab90999423513d6f SHA-1: b8e6bcf80db1e7bea13e963270ac70e1f4d41880 SHA-256: a0ccdca0756c2e7a3c0c312328494fdd41ff642aef05ef73b848be679823dab9
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 0.9997

Heuristics 6

  • 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.
  • 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://druttle.ru/aws?utm_term=premiere+pro+cc+tutorial+in+hindi PDF link annotation
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/5287337.pdfIn PDF document text
    • https://kexoxuneve.weebly.com/uploads/1/3/4/5/134501441/lanipeguvatowe-likevivawujabe.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/nusekitetirulavovubapuradrt6p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370304/normal_5ff692cb28240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_602505b1cb589.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/tigulurivuje.pdfIn PDF document text
    • http://francobusiness.com/54053858561rg3nv.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/najakodito.pdfIn PDF document text
    • https://defaxudenuged.weebly.com/uploads/1/3/5/2/135293647/673776.pdfIn PDF document text
    • https://gomujivas.weebly.com/uploads/1/3/5/3/135321586/fuvarixibiwepux.pdfIn PDF document text
    • https://femesizexib.weebly.com/uploads/1/3/4/0/134018571/3218736.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://s3.amazonaws.com/gixirojozogufux/chinese_keyboard_android_apk.pdfIn PDF document text
    • http://rorufefujolag.rf.gd/concatenate_two_fields_in_access_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/65361135042.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/first_year_online_admission_form_2019_karachi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/cassette_video_game_for_android.pdfIn PDF document text
    • http://mevidow.epizy.com/28946885499.pdfIn PDF document text
    • http://tewamenuve.rf.gd/android_auto_google_play.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/81212115962.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/japanese_animation_model_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A1 5016 bytes
SHA-256: 339e43b8ad02fd65973693f6e175c8fc200e86c1b463e7c48d9d1c1890da2c2e
font_01_sfnt_off0000d36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36B 10180 bytes
SHA-256: e7de09b2c8a206866bcda41118a435f994e2d8924d5384a3b6784a0d93831f7a
font_02_sfnt_off0000f627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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