Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3172191637683c0…

MALICIOUS

PDF

76.3 KB Created: 2021-02-26 13:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dee6db273d6db7a83a40924365d3c899 SHA-1: c171e4bee8823bc5b45169d56f1ee33c5978d8a6 SHA-256: a3172191637683c0d0eb5a039a14780158ad6f1d935306483643fa5e1129ea13
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to motorcycle ignition coils, likely to trick users into clicking the malicious link. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF, which is likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/123?utm_term=how+to+test+ignition+coil+resistance+motorcycle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_6015c4744327b.pdfIn PDF document text
    • http://cosmosqrab.online/plantronics_voyager_5200_pairing_with_laptop8mncl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_6008e1c651883.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/kasabuxoc4gyv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_5ff7d4acc5631.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374689/normal_60004707c0162.pdfIn PDF document text
    • http://fitness1.space/good_morning_america_reporters_nameschjn5.pdfIn PDF document text
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/kigulifulo.pdfIn PDF document text
    • http://fruit-citrus.space/2563309089654olb.pdfIn PDF document text
    • http://nowexevor.iblogger.org/wuredemikawawiwugalogav.pdfIn PDF document text
    • https://nazutusimeraj.weebly.com/uploads/1/3/4/8/134883567/4323296.pdfIn PDF document text
    • http://hookup753.fun/highways_agency_traffic_report_m256wlex.pdfIn PDF document text
    • http://megalit-korolev.ru/binewajagudojifawesivenmrvil.pdfIn PDF document text
    • https://xajupodesuze.weebly.com/uploads/1/3/1/3/131380723/4fe28052.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/corel_draw_x7_para_descargar_gratiszmu5m.pdfIn PDF document text
    • https://gosalojuwik.weebly.com/uploads/1/3/6/0/136050429/43df5ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://potubavaziripek.epizy.com/mla_format_citation_website_without_author.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/ti-_84_virtual_calculator_for_mac.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 5272 bytes
SHA-256: 291bbfc5ddf29a855768a1cd5f77f702ac9e836524d1f93137b320c11e56f6ed
font_01_sfnt_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 10428 bytes
SHA-256: 9185f9a62148a34d90bef9652ec2c75e8170b2652bba6d2488d52c605c1b8911

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