Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bbfab87e29d32e…

MALICIOUS

PDF

68.3 KB Created: 2021-02-24 12:20:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a4403b2af093347123ddf78e117b3151 SHA-1: 3bc592257a819687e514fa5a3cc575d66d9fb624 SHA-256: a9bbfab87e29d32e1ba26426c9218a71c36efde5b4db618e5e5658818c888255
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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/wix?keyword=saeco+via+venezia+coffee+machine+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4462714/normal_60300d573c9c1.pdfIn PDF document text
    • http://winoorama.website/samsung_galaxy_s5_sale_priceg9wgv.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/ziwafofu-waxitanowajas-kazafitobamo-zujowebozavimat.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/9872138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5ff4bc9358e07.pdfIn PDF document text
    • http://domastmsk.space/tuxiwiwoymk0r.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/zenurikaposadib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_6026ee6953a9a.pdfIn PDF document text
    • http://juzajikadig.22web.org/mechanism_of_metformin_lactic_acidosis.pdfIn PDF document text
    • http://tigazefu.iblogger.org/theatre_script_format_uk.pdfIn PDF document text
    • https://nubavusixid.weebly.com/uploads/1/3/5/3/135348304/2b17d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molarawofopojib.rf.gd/nusogamajisoziwivotojidi.pdfIn PDF document text
    • http://dowulutidapewu.epizy.com/98219602351.pdfIn PDF document text
    • http://fapomotomojopog.epizy.com/15116422431.pdfIn PDF document text
    • http://fipizojuj.rf.gd/60434200422.pdfIn PDF document text
    • http://jetetejev.rf.gd/java_programming_interview_questions_and_answers_for_selenium_testers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B1 5060 bytes
SHA-256: d5bda0c44318530428289d4b6e319a54377ebbe8b38a713b92bb3da54663068d
font_01_sfnt_off0000d6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D6 2156 bytes
SHA-256: b7d2811abd610e1afac51195fcb467254fa996601faabed743e98b0e80f7d5fb
font_02_sfnt_off0000e040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE040 10368 bytes
SHA-256: 6d317de88964803e6095809c263b67c2b0b3d42afdfe08acaf6f606aa74a8f2e