Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd27185ef5dd3ccb…

MALICIOUS

PDF

81.2 KB Created: 2021-03-17 05:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 14e33f35f58d2cfe5b66a2fc22e9e1ae SHA-1: 2b223bbfa384ad487b017533b0d178a1b0bec39d SHA-256: bd27185ef5dd3ccbc1c8fbcdbc8a7467ef66590aac46fdb59652ccdbf982a4ad
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of a callback lure heuristic further supports a phishing or scam-related attack pattern. While no scripts were explicitly extracted, the PDF structure and link farm behavior indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/strik?utm_term=what+type+of+charging+cable+for+kindle+fire PDF link annotation
    • http://ralugugifoxatir.scienceontheweb.net/aide_au_logement_caf_2020.pdfIn PDF document text
    • http://xojakipizixa.22web.org/ant_video_er_similar.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/meriv.pdfIn PDF document text
    • https://pudijamarotu.weebly.com/uploads/1/3/4/0/134000536/davodape_barasa_rizafekibujav_gemezamunaj.pdfIn PDF document text
    • https://tiwedipetubed.weebly.com/uploads/1/3/2/8/132816066/nepili.pdfIn PDF document text
    • https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/digofaditugigelepe.pdfIn PDF document text
    • https://mamumudud.weebly.com/uploads/1/3/0/8/130814078/4025180.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/samsung_wa400pjhdwr_aa_filter.pdfIn PDF document text
    • https://fumaletaseker.weebly.com/uploads/1/3/1/3/131381433/6620885.pdfIn PDF document text
    • http://basunori.22web.org/66885378011.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/f7727300-d89d-405f-8b0c-841bf1eb5608/lease_agreement_cancellation_letter_format.pdfIn PDF document text
    • http://fuvezijejek.epizy.com/xoxitekurodaxoka.pdfIn PDF document text
    • http://gugogedufos.epizy.com/govinda_namalu_telugu_mp3_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/56717995280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3ea682-8156-4794-be9a-8c82894d1832/dead_suns_rebuild.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aaefb5b-214a-4947-a746-458eddff838c/yard_machine_lawn_mower_blade_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e58a8d4-bb11-4635-b36f-f12b8116fac7/71761960127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b731d07f-cb96-4d51-9f52-4e9089eca4bd/buzeze.pdfIn PDF document text
    • http://gawuvuv.epizy.com/baby_girl_birthday_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7219e1-fd50-4323-b07f-2123781c47af/cyberpunk_2077_the_highwayman_code_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc44ddc9-ec2b-4677-b9c5-f99c4e025386/52550168029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a04aac-46f0-4fdd-a33d-c188253fd835/37709582681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b22cde9-f20b-4771-ab04-cb42caed4e75/10788206781.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/adblock_for_android_apps.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_off0000fe01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE01 5560 bytes
SHA-256: e44fff629a69d9363e423b58c92d586e2d085d913217644237fe193fb49e297b
font_01_sfnt_off000110fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 11200 bytes
SHA-256: b9f9803a12cb2fd27cba15ed354cf53470d8ccb1dbf86c92454a5e2055538cb6