Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7069d8fa77e534…

MALICIOUS

PDF

89.4 KB Created: 2021-01-21 09:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b892fbf77fc13b8eaef9c1684c324785 SHA-1: 8b31bf306abf5f508054dbee553d64acfcb023ce SHA-256: 0c7069d8fa77e534103dc08ec48275dbea35bc1f5dd0e06506299c024c9a7344
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 and routes users through malicious redirector infrastructure. 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=pokemon+ex+cards In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470231/normal_5fea0440cd5ae.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/6716242.pdfIn PDF document text
    • https://kiragidemi.weebly.com/uploads/1/3/0/7/130775435/boriw_kakotapijulof_domenamotiku_rolajik.pdfIn PDF document text
    • https://warubexe.weebly.com/uploads/1/3/4/6/134647576/45f91a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_5fac48d217615.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/hjhf9N8/forest_kingdom_names.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5f92ca298ed37.pdfIn PDF document text
    • http://ponopawux.iblogger.org/weminozoserodefamu.pdfIn PDF document text
    • https://cdn.sqhk.co/wogebebaruro/jj6jfhi/keto_baked_cheesecake_no_crust.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455673/normal_5fcda9d06de25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5fbaa1887d549.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/VujUqbl/surogofimomeru.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/ehfhkdx/vuvin.pdfIn PDF document text
    • https://naxulukituno.weebly.com/uploads/1/3/4/8/134879135/e539df032a66b66.pdfIn PDF document text
    • http://pozesex.iblogger.org/airplay_pro_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/5thh4W0/blazing_star_plant_australia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobobowu/59195651965.pdfIn PDF document text
    • http://kiwasebax.epizy.com/examiners_report_aqa_english_literature_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/blender_2._8_free.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_off00011196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11196 3796 bytes
SHA-256: 99524c0ae4371b44f27905fa8455cb91e88b0dab85ddf8e6413f93ea9d12fb59
font_01_sfnt_off00011f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2B 5188 bytes
SHA-256: 9564606e7bfeda0fcdfac751621346b273b5e2774cf2666ec6a7f1616c99d64a
font_02_sfnt_off000130be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BE 11056 bytes
SHA-256: a67d390bd3fbe5dc015a024c01367eb28e06775c301014860e692de96ae58bdf

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