Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0f9efa202148ca…

MALICIOUS

PDF

79.6 KB Created: 2021-03-16 05:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b2582bee25d8b2a583f3ace5fbf25a7b SHA-1: 9fa404d382160d61435a338437a2feb6c02c6df7 SHA-256: db0f9efa202148ca78de1ebcc56063b5493a5d767919081e041f47cbce34d45f
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one identified as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, appears to be a lure, possibly related to search terms like 'abby wambach wolfpack pdf'. The primary attack pattern involves directing users to potentially harmful websites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=abby+wambach+wolfpack+pdf In PDF document text
    • http://gatorama.space/work_smarter_not_harder_book_free_downloadz499d.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/JgeJhbA/69432970500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473041/normal_5fcad0972151f.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/musorevuzen.pdfIn PDF document text
    • http://ru-1.casa/59533153744pgg05.pdfIn PDF document text
    • http://alexandreablog.com/4099220096772kc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5fcf399c7e94f.pdfIn PDF document text
    • http://okrasote.info/93877424014hm3lg.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/exEIgd0/true_football_national_manager_patch.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/jeJidid/airtel_my_number_offer_bihar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5fd1cb05bc2b3.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/bgenhjK/82176848318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421352/normal_6041c4570b7fd.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/english_b1_level_vocabulary.pdfIn PDF document text
    • http://help-copyrightservice.xyz/dizubijevumaselazaveligo7j26p.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/jgfejdB/rulomajibup.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/what_food_do_you_eat_on_noom_diet.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/998c5940-9855-46c5-bfe2-878d32b32015/jam_speaker_will_not_turn_on.pdfIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_eb49e71aa4d84884a8f8b742f91fa398.pdf?index=trueIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_8e7388e8b42c43abbd2077fd9a1f44fa.pdf?index=trueIn PDF document text
    • http://tifavamifikas.myartsonline.com/16763255977.pdfIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_2f32c8909f504c0d817b5465b97fcc1f.pdf?index=trueIn PDF document text
    • https://37459de8-d961-4a2a-897a-801dad55dcfc.filesusr.com/ugd/1395e2_410398b588c643728a906dd737861e03.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0456d3c-c6df-4a8b-9161-fba92a7fe49d/how_do_i_get_my_lg_washer_to_drain.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_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 5508 bytes
SHA-256: 6ce74c8d425c178d0eff4933343189db9473948a04d2a4093724844d169908dc
font_01_sfnt_off000104fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FB 15448 bytes
SHA-256: 9dcfaedd70041e69b2606a1b4db9a339a982b576b8b1177fbc47f893a9456c2f