Malicious PDF — malware analysis report

Static analysis result for SHA-256 025bbad44474e619…

MALICIOUS

PDF

75.2 KB Created: 2021-03-28 00:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 354b7b9ed32a05c669f6e10b7698dafd SHA-1: b7e60023c6620b2a9d04710ef780cae04de86aed SHA-256: 025bbad44474e619da158cbac5440112044f49b16e3dd67e063a629cc961c9a9
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable hosting, suggesting an attempt to drive traffic to potentially malicious or spam-related content. The presence of a URL with a 'utm_term' parameter further supports a phishing or SEO spam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://baarspo.ru/123?utm_term=grammar+english+exercises+with+answers PDF link annotation
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/ruvozojinufimi_tamarumupitiwed.pdfIn PDF document text
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/dumarekupe.pdfIn PDF document text
    • http://sy0n.icu/cooking_mama_all_recipes_apke2ct1.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/voraxupoze_foxiwo_wezuworonasilo.pdfIn PDF document text
    • http://podarokinsta.site/maintenance_worksheets_freesoz98.pdfIn PDF document text
    • https://rugekake.weebly.com/uploads/1/3/4/5/134518704/mivuxanubogivil_fitijitavevemij.pdfIn PDF document text
    • https://zekupepub.weebly.com/uploads/1/3/5/9/135992873/vulazabiwaf-tulibofufeze-fekewos.pdfIn PDF document text
    • http://mailedflkf.site/5262387392957fq3.pdfIn PDF document text
    • http://cafechorsu.ru/losurawifoe5qb8.pdfIn PDF document text
    • http://nikomodemudajo.iblogger.org/roland_fantom_x6_61_key_keyboard_workstation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefiraxubuviwep.epizy.com/bsc_1st_year_chemistry_notes_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bca89a2-12e2-40d3-abb9-4ed992e3036a/vadetofipi.pdfIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_3e138679aae543f9a3d315a991dff503.pdf?index=trueIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_835bc59c95cc4e6180a008f35dc362a5.pdf?index=trueIn PDF document text
    • http://lemijafuw.epizy.com/26512686352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d139965-09b4-406b-b7c9-db9ccdd5bccb/zinetazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d4c3a30-0d75-4059-a15b-ea29d4b07ea8/what_is_a_law_review_comment.pdfIn PDF document text
    • http://najunanewoji.rf.gd/gukutuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cc9f2c-81f6-496f-9ef9-81450e42df1e/free_survival_games_not_on_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f7a763-ed89-4adc-b31e-64e0ff50c58d/what_is_a_par-q_form_used_for.pdfIn PDF document text
    • http://fefisapuvekebi.epizy.com/little_shop_of_horrors_musical_storyline.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_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 5404 bytes
SHA-256: 03bfc10395e83d50921b7f07ba0addaade72b2f91af1e87906357472a0c2455d
font_01_sfnt_off0000faf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF5 10664 bytes
SHA-256: 671a6d5bd93ec09883c99eadf6762cb9dc79287262be7f9f684f7dce3fca1f52