Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b5e5bee3000a64…

MALICIOUS

PDF

85.1 KB Created: 2021-02-08 17:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8406922f55caecde190f20ed67b64223 SHA-1: 78e7f18745e8e1314bf9863573712d6c1928a213 SHA-256: 08b5e5bee3000a642f699feb8b905e1094f9edc9ea5f219a94c50ab9ca65d5b1
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and a link farm, including a critical finding for a PDF redirector link to 'yafferge.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?utm_term=dawn+of+isles+war+mage+guide In PDF document text
    • https://nopefulewipedu.weebly.com/uploads/1/3/4/3/134314682/26244.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/uwihWet/tiny_house_builders_in_houston_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/mobubivifa/zgjihjg/cats_vs_pigs_battle_arena_apk.pdfIn PDF document text
    • https://pisesiwez.weebly.com/uploads/1/3/1/4/131453260/fibijikudumomogev.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/C6UJhbd/90890474628.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/Wliiuhd/76704961647.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/1Oqhcji/74752669748.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/ghalNje/zonokibula.pdfIn PDF document text
    • http://fitit.space/xekavuqgjyv.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/vixuwogetiv/age_long_form_in_medical.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/murirodunewozasuzupubapod.pdfIn PDF document text
    • http://xovimed.rf.gd/16734331800.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/vce_exam_timetable.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/bekimutagu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 5316 bytes
SHA-256: 0b4d9730511e0c8706d2e4594bf22fda6c9fd63e52e63f60d2d8e0287a999e95
font_01_sfnt_off000101df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DF 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6C 11648 bytes
SHA-256: a045f47ae50484cd00a55d5e5a6874ce18c1d38c89d33d7fce6444bdd3b58fde
font_03_sfnt_off00013218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13218 16096 bytes
SHA-256: 3bb08857b08983a257d5a2052628e18542fd51c8d29f5bbef87ea8b8ace00841

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