Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d5970cfb2dfaf0…

MALICIOUS

PDF

73.1 KB Created: 2021-03-13 18:43:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e327a4d1b5854108c17cfa239a0e397f SHA-1: bb8bda81b1689d15916f0154cbb07197b7f85871 SHA-256: 94d5970cfb2dfaf0c3e29c4fff53219f421bd39430afcb3b0bb24e9309cd91a1
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 an ML classifier. It contains embedded links, including one pointing to 'yafferge.ru', which is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to product searches, suggesting a phishing or scam lure. The presence of multiple links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=beats+solo+2+wireless+rose+gold+best+buy In PDF document text
    • http://skout.tech/fuwisalesamavewaxi6kgw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489032/normal_6014c04e82cdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_600e4093294bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490369/normal_604aa6b42271f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_600d08ca81cc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450625/normal_600e74fadbcf1.pdfIn PDF document text
    • http://itgermany.net/clarion_nx501_radio60k40.pdfIn PDF document text
    • http://idealica-italy.site/dyson_cinetic_big_ball_animal_price_comparisonv9olg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_603d43ae12cdb.pdfIn PDF document text
    • http://znakomstva69.space/faxemuguxefssl8k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5fec3b513cc6a.pdfIn PDF document text
    • http://raftgjgr.space/plantronics_voyager_5200_wireless_bluetooth_headset_chargerzg0o0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455196/normal_602094eb10c4b.pdfIn PDF document text
    • http://draiwenstore.online/how_many_black_clubs_are_in_a_52_card_deckqedom.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/af2e23ec-d5e5-487b-a151-b342f0b93021/can_you_get_out_of_a_business_lease_because_of_covid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38beae04-b09b-427e-a5a6-bc306ee9d87d/how_to_adjust_a_howard_miller_mantel_clock.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/fishbone_template_labs.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/album_maker_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67dfb5d-6999-4630-81d3-d3a7fdc1d980/what_to_look_for_when_buying_a_second_hand_hybrid_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9afc53f-4a2d-482c-814a-635cbbfdfbcf/behavioral_neuroscience_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/565c4ba9-c992-4467-9cf6-e512a6ce62af/omron_bp760n_extra_large_cuff.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_off0000e187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE187 5508 bytes
SHA-256: c1c207401f8b4f4deebed51a04bb099224637745632eb8cc628c7375dc01d7ca
font_01_sfnt_off0000f467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF467 10100 bytes
SHA-256: 855ef7adca9dd93e6700018433b5c7b9f9e1a8e0aae6accaa48db9ab87be4d9c