Malicious PDF — malware analysis report

Static analysis result for SHA-256 f930f97c0cf113ce…

MALICIOUS

PDF

71.0 KB Created: 2021-06-06 10:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ff822b1e312c6bec19d648ef27314f2f SHA-1: dcebf8f5827762be4dfb0a0a3f3368e769338c60 SHA-256: f930f97c0cf113ce222e49464945c94c779315eae2a07d6c0bfd713c0dbc36ad
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to drive traffic. The presence of a URL with 'huuuge casino hack' suggests a lure for potentially malicious content or phishing. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://medvor.ru/pbw?utm_term=huuuge+casino+hack PDF link annotation
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/pafabegotuvobilezew.pdfIn PDF document text
    • https://jijajaxasivezix.weebly.com/uploads/1/3/4/5/134588510/bujit_bawupesibaziv.pdfIn PDF document text
    • https://luwanolukurodo.weebly.com/uploads/1/3/5/3/135397368/relibunabifusevibup.pdfIn PDF document text
    • https://zapikomamotal.weebly.com/uploads/1/3/1/6/131606370/jazatajulox-furukazejutove-kiwutaralo-nuziv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://felefejimax.pbworks.com/f/29794437683.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/f/apprendre_parler_franais_couramment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe4c5fd-76d4-4d97-9e1e-de85788d009d/pudaviditomojakafiwik.pdfIn PDF document text
    • http://piwomimagito.pbworks.com/f/lotomabajejaveda.pdfIn PDF document text
    • http://gifavipa.pbworks.com/w/file/fetch/144588783/12218859087.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/f/can_we_really_increase_height_after_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246447bf-fc23-482e-a75f-da69a484fce3/blink_malcolm_gladwell_audiobook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d0957e-d23c-46fd-bf89-2e3a6b9baf6e/zinagoregewufiko.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/31444424373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8bdf7b8-8ea1-446d-a969-bbbd03f627cf/47471604578.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/f/friction_on_horizontal_and_inclined_plane_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e5cfd6-f04f-40cb-a610-54ebcf307eed/xobibuduxuxuvepeb.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/56088400646.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/w/file/fetch/144669195/why_are_there_traffic_laws.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df3acea-54c5-43b6-abab-3e3add61a846/21114337312.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/vilub.pdfIn PDF document text
    • http://dejulagimu.pbworks.com/f/how_to_print_2_pages_per_sheet_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcea0840-3370-4c14-a030-b70c11573164/69038275659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9a542b-e2cc-41f0-a45f-56b2728a1c76/how_to_improve_a_child_social_skills_and_relationship_with_peers.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_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 4960 bytes
SHA-256: e159f99b28b6c53a18348b1d56a584f87657dfabf8bcbab5eb0b34335a3e0786
font_01_sfnt_off0000eba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA4 10508 bytes
SHA-256: f5821f7e8a66d4463ca456910cc4f55a389e5489c04800c91e935b61387740f9