Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9663d41dd31d601…

MALICIOUS

PDF

65.8 KB Created: 2021-02-11 04:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 68ff31b74c8a8215a9ad2409daf98fa2 SHA-1: 0ee1a193536fd61eacfa20bbd06622dc7d1a88a7 SHA-256: e9663d41dd31d60143ef9633d8ad9a2a2c5980208190f42cdf340d7c1e411955
184 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://yafferge.ru/123?utm_term=family+guy+season+6+episode+5+dailymotion', are designed to lead users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest an attempt to exploit user curiosity or search behavior for malicious redirection.

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://yafferge.ru/123?utm_term=family+guy+season+6+episode+5+dailymotion In PDF document text
    • http://kibipasadas.iblogger.org/mamakowemafoxex.pdfIn PDF document text
    • http://accueilcmb.com/baby_im_yours_memetw958.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/dAihSWc/15052501802.pdfIn PDF document text
    • http://firstdoctor.xyz/64983063500obd1i.pdfIn PDF document text
    • http://ontrade.top/jesabuwadabez2wmn.pdfIn PDF document text
    • http://naderuromopuru.22web.org/rojarexizedakado.pdfIn PDF document text
    • http://limons.space/kms_office_activator_freehn4wu.pdfIn PDF document text
    • http://mozodulo.iblogger.org/fotereladekonawofek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabaxufonekefen.epizy.com/13589204950.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/bhoot_fm_2_november_2018_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/tyrwhitt_shirt_size_guide.pdfIn PDF document text
    • http://sivigowukom.epizy.com/low_back_pain_in_pregnancy_guidelines.pdfIn PDF document text
    • http://jolasesiv.epizy.com/fezukokelavemuzi.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/82271191829.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/jaani_dushman_movie_video_song_free.pdfIn PDF document text
    • http://kanulinuwuri.epizy.com/91813351934.pdfIn PDF document text
    • http://zawozunilutufu.rf.gd/tenokupapapok.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_off0000c571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC571 5520 bytes
SHA-256: aa5a0c3f9d8b01ba7ec2c5a5eeb47e3ab68520d9fbb81c3a5c83ef11030aed54
font_01_sfnt_off0000d832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD832 9936 bytes
SHA-256: cae2e876275308cd015950f3f874006230ec3f1cc471115a4bcba65752de8906