Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3e2278f1141491…

MALICIOUS

PDF

67.2 KB Created: 2021-03-12 21:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 853b9f270351345a5171fde495025593 SHA-1: b890ac32da8368f7c07abec3df3897db863fc175 SHA-256: 4d3e2278f1141491b67dce101688bb39494bbb28de67245bd87eedc1fc3d3f1a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://seumenha.ru/123?utm_term=nick+cannon+chiraq+performance PDF link annotation
    • https://salubekera.weebly.com/uploads/1/3/2/7/132740515/fiwazifimumeg.pdfIn PDF document text
    • https://nimifitirujaga.weebly.com/uploads/1/3/4/6/134693460/kagovotakek-lojuribadub-kesulojab.pdfIn PDF document text
    • https://bizavewes.weebly.com/uploads/1/3/5/3/135323934/zukapagubojifakak.pdfIn PDF document text
    • http://genusadnlo.space/what_does_fc_mean_on_your_alarm_system0fzq6.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/wigugajofuxoso.pdfIn PDF document text
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/bbdb26f179a.pdfIn PDF document text
    • http://procripton.com/205838588151i0k8.pdfIn PDF document text
    • http://soul-felt.com/carson-dellosa_spanish-ms_hs_answersf0lip.pdfIn PDF document text
    • https://sisebafob.weebly.com/uploads/1/3/0/7/130776599/naguvedabuvop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/diesel_fuel_msds_sheet_shell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad5aaea-e11b-4e31-9eb4-5883c641ccbf/what_are_job_titles_in_fast_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668bc33a-73f8-449c-a9c3-d4e9e4ed4d23/2261497648.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/narefumanowi.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/wdw_animal_kingdom_map.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/sat_writing_practice_test_2_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e125554-26bd-4b7e-b832-36aa3ad49067/motorola_radio_accessories_houston.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/ofac_countries_list_2017.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_off0000ca8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8E 5204 bytes
SHA-256: eb22791374cc094cca700c417061525a83e0618605e5ae2a0469cbd997b6fdcf
font_01_sfnt_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 10432 bytes
SHA-256: 282fd3314bc1c44308b4f7d327fca7a6f4f83d3353a5545a4c7b390cbdf371b6

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