Malicious PDF — malware analysis report

Static analysis result for SHA-256 1141f8c765187673…

MALICIOUS

PDF

79.7 KB Created: 2021-03-12 10:17:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 29e4120a93d543e501c1c60b0000a0a6 SHA-1: 9e879e7a17ab7301b42fa4fc3d7bb82835b25d82 SHA-256: 1141f8c765187673035b71d6ab58a03fd78a689d72657a1ec1d1dd3c011e0c90
126 Risk Score

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 0.9991

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://soxebez.ru/123?utm_term=arduino+software+free++softonic PDF link annotation
    • http://povulofi.mywebcommunity.org/tikiwateduwedofobogoluj.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/brills_express_today.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/e5zPBgd/death_pipeline_hawaii.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/jjlijQw/flight_control_harbor_master_planes_controls.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385421/normal_5ff1fa8a0a437.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/RGijShy/police_officers_shot_in_compton_today.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/ijhjFje/translate_b_inggris.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481527/normal_60215fae20a65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_602622efe1d3a.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/iQjgOgi/ninja_foodi_grill_walmart_black_friday.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427795/normal_5ff8623955de4.pdfIn PDF document text
    • https://cdn.sqhk.co/mopijiluxu/ehjjiii/fun_word_searches_for_adults_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/latipizi/ugiTig2/65361734404.pdfIn PDF document text
    • http://watogoda.mypressonline.com/4865327872.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/97540590952.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/21409120507.pdfIn PDF document text
    • https://cdn.sqhk.co/figesuweno/igijhbV/starcraft_pop_up_camper_canvas_replacement.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/fdda25b3-5ea1-4b59-b312-86cba884fa31/17067921403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f4d206-a3a6-4cb6-b360-25dd9add67da/shadowrun_snes_weapons.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/lowrance_hook_5_hdi_depth_finder.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/fozuzexetuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4cefe9-a68b-42f0-bdaf-997b23a1df94/48192469401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7ec434-a2cd-4b86-a2de-e6251eb2c243/why_does_my_fitbit_flex_have_2_blinking_lights.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_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 4948 bytes
SHA-256: 9060bea1382cf395b27e5a6558d3bd45ae1792bb82dfaa6d43061b66f5560933
font_01_sfnt_off0000fea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 10596 bytes
SHA-256: 1c1b27b34c1c02a127ffae128e8474205bb5b198dd38b0c33e2c32e5c66a41ed
font_02_sfnt_off000122ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e