Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0e6c18c4822d8c…

MALICIOUS

PDF

81.7 KB Created: 2021-03-17 15:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60d52093e11efa0de1b5fda09a5c9ce1 SHA-1: 58038b6da60b190fc1a8684e1a5abc9804039143 SHA-256: af0e6c18c4822d8c94b776eb52280130210314be74def2406b545787295b9ace
186 Risk Score

Malware Insights

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

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 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://zajinet.ru/wix?keyword=manual+transmission+swap+dodge+charger PDF link annotation
    • http://divuwon.iblogger.org/free_music_player_for_ios.pdfIn PDF document text
    • http://korsabarca.com/how_much_do_general_managers_of_restaurants_maken8kfg.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/donobomivemawepax.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/xQjbGii/nexefezo.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/0957c406819a5d.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/ib7igic/nike_windrunner_jacket_black_and_gold.pdfIn PDF document text
    • http://nonuxuzelubit.22web.org/basefizupuv.pdfIn PDF document text
    • http://trysol.xyz/glory_in_death_audiobook_youtube0e7be.pdfIn PDF document text
    • https://cdn.sqhk.co/fekebazi/jaDjbvn/gezomoxovozen.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuzofu/cQsibih/zupewepenasevitosibajeru.pdfIn PDF document text
    • http://rat-red.space/little_fires_everywhere_episode_6_explainedolwgs.pdfIn PDF document text
    • http://detonicinitalia.website/nbde_part_1_questions_free_download7iart.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/fdcae63f13eac91.pdfIn PDF document text
    • http://madewithsunshine.com/esl_second_conditional_worksheetpdlgf.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/5cde30c8-6333-45a9-9186-af148b9a3e92/64624430969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23120fd0-9c3e-4ec7-9f32-102650cb616f/american_stories_a_history_of_the_united_states_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f33a2d5-4b33-4f44-94dd-8c9d752e4709/xanolugelonere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c2b390-f4da-4686-8433-d84dcd45dcc3/hard_reset_rt-n66u.pdfIn PDF document text
    • http://nawonuzegajosi.epizy.com/electronics_projects_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d64026c-be9a-432f-95c9-501d9b757821/gukam.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_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 5468 bytes
SHA-256: b5c6391e3e240e87559911caa6c2e3b39cadc4a8560c3d4c70f8c25c03a67527
font_01_sfnt_off00010469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10469 11692 bytes
SHA-256: e534ca634bddb7b3449db132e2cb0b7fe960fd9b671a7ea53a2bab3fbebaf8d7
font_02_sfnt_off00012b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34