Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf178c7d13c1182b…

MALICIOUS

PDF

83.9 KB Created: 2021-03-27 23:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6a7f4e200c014cc7457c2ea3af4cad81 SHA-1: 3109c1fda2ad60994db7d4c66f891ebe5ce3be6f SHA-256: bf178c7d13c1182b511cd8cf437b9630684395798e3248fe698078c08b9aaf43
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URIs, with a significant number pointing to potentially disposable hosting. The primary URL, https://xajibur.ru/123?utm_term=connor+mcdavid+injury+report, suggests a lure related to sports news, likely to trick users into clicking through to a malicious site. No scripts were extracted, but the structure strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://xajibur.ru/123?utm_term=connor+mcdavid+injury+report PDF link annotation
    • https://cdn.sqhk.co/xobakidanav/bghWw5l/graphing_linear_equations_worksheet_7th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/euf2Yii/final_fantasy_vii_remake.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/dhiPGji/snow_bros_game_download_for_pc_setup.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/wmughie/84859831142.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/Lgcgflp/72575996806.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/AhiigcU/ludo_star_online_game_download_for_pc.pdfIn PDF document text
    • https://senejudav.weebly.com/uploads/1/3/5/3/135348848/6301828.pdfIn PDF document text
    • https://cdn.sqhk.co/ronuwimo/enhgij2/rixisogigetemawedulipedi.pdfIn PDF document text
    • https://cdn.sqhk.co/xukigipeduve/ZheggtH/45943575534.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/iL1jjjd/interesting_short_stories_podcasts.pdfIn PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/xotijipi-sedutadamaki-gejoxe-lupibekiretu.pdfIn PDF document text
    • https://cdn.sqhk.co/kapokosop/i97qSBz/hexion_chemicals_stock.pdfIn PDF document text
    • https://cdn.sqhk.co/fifunolew/olGeS16/contech_balance_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/fyhblPb/micro_sd_card_scanner_online.pdfIn PDF document text
    • https://dasasaperot.weebly.com/uploads/1/3/4/6/134665710/a544e578.pdfIn PDF document text
    • https://levazisibeguni.weebly.com/uploads/1/3/1/0/131070530/25a8195731e.pdfIn PDF document text
    • https://cdn.sqhk.co/lelabepena/qPT4ib1/planetary_society_jobs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/satedafadusizo/19409268628.pdfIn PDF document text
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_25c3043dc7ba46bd86eb8c9a25465297.pdf?index=trueIn PDF document text
    • https://921790ca-7b53-43bd-a25d-275d6f056404.filesusr.com/ugd/9d24cb_9aa5a58435194d10894a5fd68a7c4172.pdf?index=trueIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_a178eea00de948a68fcd50c5a3a38813.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/washington_state_senators_phone_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/selilulodij.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/56273661173.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/49279661965.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_b139e259e50f4c57b569cac26ee9c46a.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 5152 bytes
SHA-256: 101bdef96431d507aae021b7abb5b4a10a94eaf3bae1f1be17dab464535a35ef
font_01_sfnt_off00010bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBB 11692 bytes
SHA-256: 82353664c9ec7e0832b42fe32d2823cf6a4cd46c19c07878934a8b5e8accd872
font_02_sfnt_off000133cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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