Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7944b7acb194359…

MALICIOUS

PDF

75.5 KB Created: 2021-03-17 18:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8140ec699acf4df09dcba2b3d10b4ecf SHA-1: 988769f2cb6cfe9aa4fa323076454fc355bde34b SHA-256: a7944b7acb1943596aa7b76564c740c439f600a303038b67945496e2a3aa73bc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://jottigo.ru/wix?keyword=macbook+pro+user+manual+2015+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393349/normal_5fdd5d9e89d05.pdfIn PDF document text
    • https://bipewajebij.weebly.com/uploads/1/3/2/7/132740639/nadirif-logam.pdfIn PDF document text
    • https://rirujidina.weebly.com/uploads/1/3/5/9/135957349/mibafaposad_ratewi_tefafefagone_ruvizovipaparu.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/gijaibB/ticket_to_ride_scoring.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453890/normal_5fde0e3313a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_601e50358a245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409243/normal_5ff882759db2c.pdfIn PDF document text
    • http://get3creditscores.info/nabeligoxosigozipezunurakbr569.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/dVFWhfd/33650957902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_60502021b6b17.pdfIn PDF document text
    • http://malespw.xyz/the_lost_ways_book_hardcover1vjx6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/what_is_the_bolt_pattern_on_a_2001_ford_ranger.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/ps4_emulator_for_pc.pdfIn PDF document text
    • http://zozujuzozupu.rf.gd/82820254359.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/information_about_indian_navy_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/what_is_the_best_computer_programming_language_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/91157448309.pdfIn PDF document text
    • http://namajoveteri.epizy.com/82873456352.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_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 5960 bytes
SHA-256: 602578bd41e17138f5b060e15b9d6b5fb8b4f5d48ccaab5ed87a8fbd218e757d
font_01_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 11200 bytes
SHA-256: d68ca96daa372b1674dafdb91c592e0702b0c3a52cccd156b38573368bbb3d5a

Open this report in the interactive analyzer, or submit your own file for analysis.