Malicious PDF — malware analysis report

Static analysis result for SHA-256 f21eefa49ab88f6d…

MALICIOUS

PDF

73.3 KB Created: 2021-02-17 08:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: aef4059662f836cc5edca60a2d88b839 SHA-1: 03c99ba5106779960ed206064714bd81e74ed683 SHA-256: f21eefa49ab88f6da5e85a0088fd3400d39ec0740904d89de57da65ac7e65510
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wb?keyword=is%20v%20shred%20effective PDF link annotation
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/wubur.pdfIn PDF document text
    • http://meetporte.xyz/computer_pc_antivirus_software2zz2l.pdfIn PDF document text
    • http://drenajkrasnodar.ru/dozawesunaww7d8.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/bGePFgi/97881945245.pdfIn PDF document text
    • http://clientbluebadge.com/35261442140ki2sp.pdfIn PDF document text
    • https://rifewageza.weebly.com/uploads/1/3/5/3/135349229/jebupunuba_zixiz_sozebozed_dumasiredufa.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/5027128.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/1566138.pdfIn PDF document text
    • http://shortsomfj.space/kodazonikugomemuwufro825.pdfIn PDF document text
    • http://leyloften.online/3d_surround_music_player6ls0t.pdfIn PDF document text
    • http://all-gopro.com/carvedilol_fa_davisiecgw.pdfIn PDF document text
    • http://emirofficialzm.com/digital_content_plan_template9q8s8.pdfIn PDF document text
    • http://marketitaly.info/the_last_wish_witcher_3_bookpg73m.pdfIn PDF document text
    • https://senovaxevuka.weebly.com/uploads/1/3/5/3/135304629/jakopag.pdfIn PDF document text
    • http://shop-you.xyz/spacex_jobs_salaries36j3o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BC 4864 bytes
SHA-256: 0768693c0dfd6e8cc4c245ddaa384e9dd5420e81eae7024243360012c7ddabf8
font_01_sfnt_off0000f44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44B 10672 bytes
SHA-256: eefc9b6c17f90af7cc4ba5116d906436754a3626c68767670b060a300f409f40