Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cac6874ec150878…

MALICIOUS

PDF

80.8 KB Created: 2021-05-20 11:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3cb1f1eabf9789fac74142094ac2846f SHA-1: 216381073f374a39eea6ecb65053a70d6ed7f661 SHA-256: 0cac6874ec1508780c0019a81a5ee4315fdfe22cd89b9aaf73b9ff7746002883
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to redirect users to malicious sites. The primary malicious URL identified is 'https://lozipotod.ru/strik?utm_term=physics+ia+topics+sl', which is flagged as a redirector for free-download phishing. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing and trojan threat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/strik?utm_term=physics+ia+topics+sl PDF link annotation
    • https://xatuzagu.weebly.com/uploads/1/3/0/7/130738971/xuwufonix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5ffcc6029c261.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450424/normal_5fcc5aa78ad20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368742/normal_60044b61e4fcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_602be4d85b02a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_6044fe88c446d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530171/normal_606312f31cdcc.pdfIn PDF document text
    • https://wobubowez.weebly.com/uploads/1/3/4/7/134709338/93fa2d6c.pdfIn PDF document text
    • https://gutakabumediru.weebly.com/uploads/1/3/4/4/134492877/31a156c4647d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404512/normal_5fcb3b4878f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_6027a694c069e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421780/normal_5ff476172f6d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_6045687547665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489979/normal_604b7dc165e08.pdfIn PDF document text
    • https://befejabenitegi.weebly.com/uploads/1/3/4/5/134530095/tokub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06bebb1-8d1b-47d0-bed1-f14a3c346f8a/frases_del_prncipe_de_maquiavelo_por_captulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d975b3e-1efe-4e07-9863-916f1acc5512/film_genre_moonlight_crossword.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a6121b-4fc5-4b11-be44-ebe0d3a9a742/99343193038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3667120a-e144-4430-9fb5-6e19d69dadf7/quelle_est_la_morale_de_la_fable_le_loup_et_lagneau.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d63c5cf-533f-42fd-8b00-2187b43a1111/how_to_open_root_chakra_wikihow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce43042-cb6b-4877-a256-83412f950a6a/behringer_xenyx_x2222usb_pro_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ba7ff4-edbe-4896-91c1-bb152c8f5475/sisujegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1620686-1e94-444c-8eea-70de95a4c3ce/purura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4adf9932-f162-4120-92ac-e7b4f68b0210/can_you_use_a_phone_sim_in_a_mifi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 5028 bytes
SHA-256: a27f337d75fa147992a8d817d24d4da8e69542ffe999862ea9c17772093a90ce
font_01_sfnt_off0000fa82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 10880 bytes
SHA-256: 0b8fa11012f84fdb33b43cc13b53ceb940db0e068eed227afe540af4735004f7
font_02_sfnt_off0001200d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200D 16340 bytes
SHA-256: ee8b8f013b6f51ea08ae5b70d5412f202f6a9076b23c75f4a41c6f6118619bdf