Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1347446083d8f31…

MALICIOUS

PDF

81.7 KB Created: 2021-04-18 12:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b345e2a78a64e92baf8e196eda257ad8 SHA-1: dbbf67ad4cf6a7209e543aaa2e56b9d7c54e6092 SHA-256: f1347446083d8f31655e12da2b0fb777259b0253166c6023bc4057d8a362367c
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 0.9964

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://baarspo.ru/strik?utm_term=badger+mole+5e PDF link annotation
    • https://cdn.sqhk.co/bitizulokiva/haie2e2/online_marketing_classes_in_velachery.pdfIn PDF document text
    • https://cdn.sqhk.co/bujugasefoli/ojeTgfu/farming_usa_2_all_vehicles.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/hepohuD/sms_messages_apple_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/gfFhia7/jirarexexa.pdfIn PDF document text
    • http://degujub.iblogger.org/bleacher_report_week_14_nfl_expert_picks.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/CdgcgeB/61739904616.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e3b9bdb-8db2-43f9-bc23-7ce9aa2ff716/skyrim_tips_beginner.pdfIn PDF document text
    • http://dubejatusir.epizy.com/35626191899.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_5438089177f948d99a3c552489b7895d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46b7e27-2d42-486a-973f-58d42fdc18ae/nonugowopuleganorafoxegiz.pdfIn PDF document text
    • http://kesibanimi.rf.gd/pdf_bodyboss_method.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_eac4b6cc16534d01963c4dfe22a00236.pdf?index=trueIn PDF document text
    • http://jisuwexadik.rf.gd/darepatikatejupabag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37512cf-3352-4181-8e30-97c3fa40c346/ask_and_it_is_given_barnes_and_noble.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_6c61a0592c144322b61eed45c2089925.pdf?index=trueIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_8656349fd2ea426fab1b0e93f336e722.pdf?index=trueIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_fcf3e1e05aec4a67a5daaa453ea9b293.pdf?index=trueIn PDF document text
    • http://duwugedereni.epizy.com/blended_wing_body.pdfIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_07d6474748084a2794b1aad7d489911f.pdf?index=trueIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_abc1973897b7407a8358770303ef8ff7.pdf?index=trueIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_120e116f7fee4beebc1d0e3ccc86bc8a.pdf?index=trueIn PDF document text
    • https://29bb9f0a-cb36-4278-8b1c-05d86a2267e4.filesusr.com/ugd/25e746_b23dd19421fc48f0bc30b2e3d9ac4066.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3b8a81-33a4-4a04-89db-17b762334fd9/govumagu.pdfIn PDF document text
    • http://tukorokibenej.epizy.com/11560326949.pdfIn PDF document text
    • http://xitunixanamo.epizy.com/mezoles.pdfIn PDF document text
    • http://gewumene.epizy.com/44626038232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcbed6d-8e44-4b0a-ae8e-3994d6206a4f/lisovawolibikimugigu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AD 5140 bytes
SHA-256: bb6795a0eccf6c54c83fc3b4f5b201f9664509e83cad63a27204fd094b87d355
font_01_sfnt_off00011516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11516 10684 bytes
SHA-256: 9f38fee41dd99ca6663aa1461a264e9cb79a578be2fe50de06be76dd5876818b