Malicious PDF — malware analysis report

Static analysis result for SHA-256 187c64ad5f77a1ef…

MALICIOUS

PDF

72.7 KB Created: 2021-03-19 22:09:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f97606acbd68e22de69fb40a0d6f1faa SHA-1: 53a1af92938932dfae8e0738c2eefb41fba10c8b SHA-256: 187c64ad5f77a1ef369b7e1311334e82a2e9a449db8776baba2c03b2c30abd55
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. One prominent URL, 'fokemale.ru', is associated with a lure for movie subtitles, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

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://fokemale.ru/123?utm_term=chakram+telugu+movie+english+subtitles PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369306/normal_5fe0da985d0f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fca07c9e22f8.pdfIn PDF document text
    • https://redutoxaxijarow.weebly.com/uploads/1/3/4/7/134760413/bagapipowusupok.pdfIn PDF document text
    • http://form-copyrightservices.com/48502793579nt77u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5fd129cda65ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_60450ab15383f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_6039d505465fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_6037fd26b6196.pdfIn PDF document text
    • http://cmb-accueil.com/66910771535kqcoq.pdfIn PDF document text
    • https://boseveju.weebly.com/uploads/1/3/4/5/134595203/tikupabep-miposuf.pdfIn PDF document text
    • https://noginoludaven.weebly.com/uploads/1/3/4/3/134374582/16fe50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_6013b91cad4e5.pdfIn PDF document text
    • http://resimpub.com/hampton_bay_ceiling_fan_remote_kitrvkty.pdfIn PDF document text
    • https://pazaduzot.weebly.com/uploads/1/3/4/4/134473777/vurezejekokefo_pomebud_kirovasowa.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://uploads.strikinglycdn.com/files/45f4bb91-072b-4baa-9a0f-846f5cdbedef/dadabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25746d78-c770-422b-9446-be15b745e693/pebimuwom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d58f5a7-e4d9-45a4-957a-dce1d2c9f2af/what_is_one_eyed_monster_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c23c15dc-7797-47dc-bfd8-463e134d6922/how_to_layer_mask_in_gimp.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_off0000d219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD219 5268 bytes
SHA-256: eac10ea082810f0dff2dbd96e046903433bea5253b6970f64107353c80728c97
font_01_sfnt_off0000e3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 10560 bytes
SHA-256: 8a67b7201b819bb74f32eb61f9cb608f3e56678462998634636ac890617a05d3
font_02_sfnt_off00010795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10795 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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