Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0592bb3e1da79c…

MALICIOUS

PDF

127.1 KB Created: 2021-03-16 16:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9d408168033bb2c7386635e5bd830024 SHA-1: b17159b1e0e3b5cf0a50a4f5c4b1165fe51b5ce8 SHA-256: af0592bb3e1da79c6cfd782a0b4c65844fe408fe76d8495666b460411747c98a
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious websites. The presence of 'utm_term' parameters in some URLs further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/strik?utm_term=apa+professional+code+of+conduct+for+psychologists PDF link annotation
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/1201699.pdfIn PDF document text
    • https://sevexuwajewedov.weebly.com/uploads/1/3/4/5/134508994/xesagebikilup_sutes_xujovesedekid_duwasimadomil.pdfIn PDF document text
    • http://onlinekartiadesi.com/how_to_give_yourself_a_professional_teeth_cleaningycrmb.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/deb6b1d2ce.pdfIn PDF document text
    • https://rugomekedakore.weebly.com/uploads/1/3/5/3/135302214/ce0c011ef9e2ce.pdfIn PDF document text
    • http://hdvideo.design/dnd_5ed_warlock_guidekjgq5.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/idLQjfq/prince_run_game_online.pdfIn PDF document text
    • http://obmenkalnr.online/roxadutysfsl.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/81xMgh1/tales_of_crestoria_characters_tier_list.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzizadupu/9byjdmF/bugmenot_consumer_reports.pdfIn PDF document text
    • https://bigidogeto.weebly.com/uploads/1/3/0/8/130874652/1d19ffc6e.pdfIn PDF document text
    • https://talufebadag.weebly.com/uploads/1/3/5/3/135348560/memitad.pdfIn PDF document text
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/1603193.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/ejgMRUr/pibinofasakusi.pdfIn PDF document text
    • https://danupinizagene.weebly.com/uploads/1/3/1/4/131483344/fuzivanuditulupawa.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/84327ace40a93ba.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/Jjhkhfw/nail_biting_gif.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/accabf92-44d3-4e78-9093-39cf68836b44/kawobojetilamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599dffc8-ce6f-4e95-857a-13281bf42594/what_are_the_three_elements_of_poetry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26177f64-6399-4176-a1c5-49ac0f6621e4/volezijawurilajaka.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/59883218648.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/letotimasapobitusesexutug.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/company_identification_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/dajuzazijoparemagelixi.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_off0001b7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7F5 5508 bytes
SHA-256: 79f334c65b9682e5ee600800ac5d83c9cb85a7f4778100c3910fcd239f412268
font_01_sfnt_off0001cab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAB3 10364 bytes
SHA-256: 25db12bfd8690b8fa6233726c5a244a319a67d8209dd4f7bb49d84d30b898069