Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f153582a0c017c…

MALICIOUS

PDF

66.5 KB Created: 2021-02-26 15:10:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b8a2c334beea31886ae8632d457d4213 SHA-1: 22c68e963524ff7f33e2ea0e1b708d2442031648 SHA-256: 66f153582a0c017c518f87674ba00b14b59fe89b21f42b235daaa15e61441572
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=dell+1320c+manual In PDF document text
    • https://cdn.sqhk.co/wajuletixex/ghhjgmY/wastickerapps_you_i_couple_love_stickers.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/Gjghihc/suredamedujurilewinevul.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/kukapo.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/where_is_the_furnace_filter_on_a_goodman_furnace.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/55642652921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_603327ba12be0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_5fd5ff11bd36d.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/4593079477.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/jerafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426424/normal_5fe7d7b32f9ff.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/tetenifeme/97957224936.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/13525437816.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/confusing_riddles_with_answers.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_off0000c930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC930 5160 bytes
SHA-256: 5a0123e2083b71cd91a868f7acb1d7e1aa89c1d5e61027cc3a8c49fcb579662c
font_01_sfnt_off0000daba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 10228 bytes
SHA-256: 69a7a75564569d63bbd9437d60df947e13044afcbac7aad633fe04f8b9d44c48