Malicious PDF — malware analysis report

Static analysis result for SHA-256 c812e2c6238ba2cf…

MALICIOUS

PDF

78.6 KB Created: 2021-03-04 16:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 08e6084015a3bb19477da6d9e80d18b1 SHA-1: 38bcdb32331e83020598dda446606541a66853b7 SHA-256: c812e2c6238ba2cf609c3f863f99ae1ccb249ca05ad1e55c99e03e44ce76c7d4
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 0.9997

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
  • 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://crophysi.ru/wix?keyword=the+cold+war+divides+the+world PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481067/normal_5fdac19a63f32.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/what_kind_of_character_is_the_nurse_in_romeo_and_juliet.pdfIn PDF document text
    • https://cdn.sqhk.co/jevikepuja/edjgijA/microsoft_launcher_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_602bf4856c301.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/how_to_tell_gopro_4_black_from_silver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465264/normal_603d21b357edf.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/jbxygiS/mediamonkey_app_for_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405895/normal_5ff7090351ac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_60217f11ace31.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/haS4Die/jetidu.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/zijivevip/bowers_and_wilkins_zeppelin_mini_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81daa19a-b758-4218-a2d6-8bf8d4bd9612/zaributesipavizixifokixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bacb039f-1904-4e81-82c3-cb3a4d274a2d/81011200118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd851f9-3f72-414e-bc9b-78dda7520630/27931757647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46abf8dc-4ffc-48f4-81fe-02c10e9df3f8/snow_flower_and_the_secret_fan_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/marina_abramovic_performance_1974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b89b45-102d-4d0b-9d9b-6b6947a8d18c/dometic_digital_thermostat_for_rv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f85f70-18c1-4949-9ff8-91f31f1d3689/how_to_remove_gas_knob.pdfIn PDF document text
    • http://besafetusupug.atwebpages.com/guns_germs_and_steel_summary_prologue.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/46073402799.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_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 4812 bytes
SHA-256: 0768eb3dd0a616427302414299168eb940dcf876d948001392870275956acc87
font_01_sfnt_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 10260 bytes
SHA-256: 31adcc1ec96a24aaabab000c1d2f959c75bcaa7d60efa07410c3e197dd7f3a50
font_02_sfnt_off00011ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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