Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34c343659a33fb2…

MALICIOUS

PDF

75.9 KB Created: 2021-03-15 18:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c0f7d051de34503f95cea6a9a87526c0 SHA-1: 99992d41d301686b3fdd1da09f383c3b55751a4b SHA-256: a34c343659a33fb267801d99d9c128dacbb5f91eb1e12d231eedd6754d54a30b
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=gardens+of+the+moon+guide PDF link annotation
    • https://cdn.sqhk.co/jesupesiparu/hfhehgk/unicorn_food_sweet_rainbow_cake_desserts_bakery.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/chhWvLv/costumes_for_men_with_long_hair.pdfIn PDF document text
    • http://begetus11ppz.xyz/deadlands_noir_swade6s0ai.pdfIn PDF document text
    • http://svoylend.xyz/zeletituxuwigerurododime1hiya.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/IZOlifv/lil_alchemist_best_gold_combo_cards.pdfIn PDF document text
    • http://skidki-day.shop/57762393504pwc3x.pdfIn PDF document text
    • http://italiahot.fun/what_is_the_tulip_of_calvinismy9xry.pdfIn PDF document text
    • http://wisitens.online/52124009923vd0lb.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/farezelof/44241140537.pdfIn PDF document text
    • http://wotimadugol.epizy.com/wazerelarinizoxafej.pdfIn PDF document text
    • http://volomuladifute.rf.gd/98281407245.pdfIn PDF document text
    • http://dipobitabi.rf.gd/bitlocker_drive_encryption_windows_7_professional.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_1d4c3bfe85ba45dfaa70060341cf8d89.pdf?index=trueIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_5bd4af718a5c4769a3f55845fa91338e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/99eba5bc-2f43-4bb8-aeeb-6497279cf794/2009_harley_davidson_sportster_repair_manual.pdfIn PDF document text
    • http://makowopo.epizy.com/juradokobegodewolabuted.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/6540547566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a05b321d-566e-47e4-86c8-b6195dfb5e11/72995956234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580c872c-4318-470b-9973-13024e4e47ff/gusetow.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_b242bb57f3504b37b271f9462cdba6b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/692c7748-5406-44cc-afed-f1e1a42026cd/thunder_cake_book_read_online.pdfIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_4995047148b641729c3cb4d71464f1fc.pdf?index=trueIn PDF document text
    • http://salivokeru.epizy.com/matsec_examiners_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/suggestion_form_template_excel.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_off0000eb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 5320 bytes
SHA-256: a690bce98d4bae3ccf0a51995a228b76a212553144b7ffa6bac3e847e94aa444
font_01_sfnt_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 10704 bytes
SHA-256: c0a49ce119fe2c2a85aa978745689709e395fd2a336a34ccd935610aba32f48e