Malicious PDF — malware analysis report

Static analysis result for SHA-256 7232fc3bc9baff6f…

MALICIOUS

PDF

73.0 KB Created: 2021-06-07 21:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 964420d5518fcefcb4af80136006ac2a SHA-1: 292075effcfcee4abc0a57746c636916b8246606 SHA-256: 7232fc3bc9baff6f694c33025c3cb59d0efc05a1b386036d360618b5eb5fcd29
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 0.9998

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://inwebjor.ru/pbw?utm_term=partnership+accounts+lecture+notes+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494431/normal_5fee801367106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_6034cb2538afc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144419166/accounting_ratios_class_12_questions_and_answers.pdfIn PDF document text
    • http://kiletejude.pbworks.com/f/nimejulodisiwena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4538388-0331-4c25-9b4d-a5181a319bc3/the_end_is_nigh_ps4_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69239696-8a48-41e1-a454-b2993c2807a8/fight_club_book_review_new_york_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710f3fc6-e088-45f1-bd1a-80a09ccdb3ae/food_for_gym_beginners_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a6614d-70a7-4273-aa70-c89f22610630/alex_rider_stormbreaker_book_read_online.pdfIn PDF document text
    • http://pafesudive.pbworks.com/f/topukogobodiwuvogubiwuz.pdfIn PDF document text
    • http://gezebal.pbworks.com/w/file/fetch/144806601/msp_vip_hack_without_human_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a424ae29-bb88-46dd-93f2-94243bedfe75/a_level_english_literature_distance_learning_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07dbe7fe-e62a-498c-809a-3420263e8ce7/43881559988.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/laletetaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f812471-171e-47a3-90eb-b220f121acf1/97546722831.pdfIn PDF document text
    • http://lifevuve.pbworks.com/w/file/fetch/144696774/fatamovovodex.pdfIn PDF document text
    • http://wurutaw.pbworks.com/w/file/fetch/144512643/gafurubeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bb4b40-1f9a-4927-9b9a-657bdc60bf08/24843163893.pdfIn PDF document text
    • http://vomuseteweto.pbworks.com/f/85804625511.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/w/file/fetch/144621252/11167894656.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_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 5244 bytes
SHA-256: 8ba9bf9279743021a9dd54d0bc81edcf7e808c0ad6e320c86c679448886da3c1
font_01_sfnt_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 10596 bytes
SHA-256: 2cbdd9a61c6f9c65ce8c00d2260023f8b4c75ce5f73a1e1b3d2f4baeb700ead8

Open this report in the interactive analyzer, or submit your own file for analysis.