Malicious PDF — malware analysis report

Static analysis result for SHA-256 263aa783750c5c5d…

MALICIOUS

PDF

82.4 KB Created: 2020-12-25 02:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: df58bd8963ffd84a7c8c2b01980afa80 SHA-1: e249779aeab587f5ae4beb194f2680953e68e2fe SHA-256: 263aa783750c5c5d2f300df0a181e1423203982805afe5dec58ae425bb1b5299
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious sites. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a phishing or scam attempt, likely using deceptive content to trick users into clicking. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • 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://trafficel.ru/strik?utm_term=monster+truck+offroad+rally+3d PDF link annotation
    • https://cdn.sqhk.co/sofopiro/hehjjf2/advertising_definition_in_marketing.pdfIn PDF document text
    • https://fenivubad.weebly.com/uploads/1/3/4/4/134482284/6673978243203d.pdfIn PDF document text
    • https://turikiripejuz.weebly.com/uploads/1/3/4/5/134501804/rejefotekanu_lidomoj_nebim.pdfIn PDF document text
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/75143b.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/Khhgwjb/my_connect_kingston.pdfIn PDF document text
    • https://zivexipoter.weebly.com/uploads/1/3/1/4/131483036/kurufuzuwugakef.pdfIn PDF document text
    • https://cdn.sqhk.co/luvuxokam/mhedToY/anime_magic_powers_quiz.pdfIn PDF document text
    • https://sagagokibifaku.weebly.com/uploads/1/3/4/6/134625973/puvejafidazivoki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/04dd3cdc-fe4e-4881-b06a-df752b21ace1/skyrim_nymph_race.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b08c21-4606-4f5c-88c6-5906c72ca73c/logevufivopixixol.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD6 2972 bytes
SHA-256: 58d57dbf1cce936347ca7471b2ff1814838416484fbea0fdd6c82954352fee64
font_01_sfnt_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 5352 bytes
SHA-256: 6a2a8f730180a0c6176967a3df52ef45a48392fb34c7b7b9b26d135c31f558c4
font_02_sfnt_off0000ead0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD0 5848 bytes
SHA-256: 7445caf9a9c688183565aa37b36e6323ecd760f9ad52311230f26a117ee33165
font_03_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 14340 bytes
SHA-256: 917ee7c93e4ef11319f46caa151379d740da10e995f3ea29a2b0a64d9eea617e
font_04_sfnt_off0001257b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257B 16396 bytes
SHA-256: 398a10a70a464fae179f821c6358474ce86864ff66042ccc6ddda8cdb7e9ce30

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