Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db7471433a23479…

MALICIOUS

PDF

86.6 KB Created: 2021-03-09 09:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2bb1137902808fb8a7cd38933184b343 SHA-1: e8d7e9ad73ce9bac7e1c31b975ef0ac5ffcb7ba6 SHA-256: 2db7471433a23479a68e82a2a196a7582c80a37710fe7ac51761c99e945053bb
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, including a suspicious URL related to game downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's structure and embedded links suggest it is part of a campaign to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://gimoguvi.ru/wix?keyword=pokemon+offline+rpg+apk PDF link annotation
    • https://xeropupofusopa.weebly.com/uploads/1/3/0/7/130776394/3903339.pdfIn PDF document text
    • http://uscovidcharts.com/lekobejeziiolmm.pdfIn PDF document text
    • http://jakiduve.scienceontheweb.net/32483001142.pdfIn PDF document text
    • http://mmamba.ru/wmns_air_force_1_07_low_se_valentines_daylj58x.pdfIn PDF document text
    • https://rerimewanuxo.weebly.com/uploads/1/3/6/0/136036548/xepuwatafi-sapopowo.pdfIn PDF document text
    • https://pofemazavuson.weebly.com/uploads/1/3/2/3/132303373/3295149.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/ge_universal_remote_codes_for_vizio_tv_cl4.pdfIn PDF document text
    • http://accueilcmb.com/83767438665755xe.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/dutimajizowa/lazujelatimegodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b7a40a-ca96-4646-83c3-c5b564ac0591/97042289735.pdfIn PDF document text
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_5f81163b067f43d9b6bd6d083f8f7163.pdf?index=trueIn PDF document text
    • https://035e1e53-160b-41c9-b88a-fae10e05dc6c.filesusr.com/ugd/7dd30d_a3dc458b65ac40e6b34ff85fb9ce5b5a.pdf?index=trueIn PDF document text
    • http://nujugeteteda.myartsonline.com/zijag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d25887-4643-4865-9489-19cc5366760e/how_do_you_write_a_descriptive_narrative_essay_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12251e3-820a-422b-8caa-2979e0427e1d/what_is_a_garden_inside_a_house_called.pdfIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_e2174b84ed514df89825fe37cbb3b4cb.pdf?index=trueIn PDF document text
    • http://ziwivazud.onlinewebshop.net/advanced_trauma_life_support_9th_edition_download.pdfIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_f70a4b7be9944bfbb57038f196b51abe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/bejuv.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/rokiskio_autobusu_stoties_informacija.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/nojibupekotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e35395e-9362-44b5-b1b8-0a8a8ebc4eb0/how_do_you_find_gps_location_on_google_maps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401dfe55-1018-41ee-b89f-67cb6728ac39/vidas_secas_english_subtitles.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_6002b853fec4465ea32375a222a77b86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/argumentation_schuluniform_musterlsung.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000131b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x131B7 17828 bytes
SHA-256: 86c1803adf458da8009346f20c80d69bcfddc9767b70631d1407606a70b7f4ba
font_00_sfnt_off0000fd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1E 5108 bytes
SHA-256: bcbc15a73a8a3d05478abe1519b602f76401f417c55c71928b0b9cf7ba264079
font_01_sfnt_off00010e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 10228 bytes
SHA-256: 3c7fc5b294b8dfb5efab8a1445dad877e1cb21f6b5b2662f568df88545abd06c