Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d44b8c2ddb8442d…

MALICIOUS

PDF

73.9 KB Created: 2021-03-24 02:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7c438704e161e3fd036f8bf58dbb6a56 SHA-1: d8a177bfd43fbe609b548bce122be86f47f8d5b5 SHA-256: 0d44b8c2ddb8442d42b7de0e421b0869e63a1a7e3661d9ff70d0ba4e59f0425f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://botokaw.ru/wix?keyword=shotgun+vs+zombies', is directly embedded and likely serves as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via the linked content.

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://botokaw.ru/wix?keyword=shotgun+vs+zombies PDF link annotation
    • https://sejixegagetuta.weebly.com/uploads/1/3/0/9/130969850/gafuvesiwot.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/73801891280.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/ribetifufi_zaxagu_fitivedovow_fovagavemubomik.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/tipixoti.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/b89817.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/zikifenulixujakon.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/2015_ez_go_rxv_parts_manual.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/faxukatitumodofezunes.pdfIn PDF document text
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/d1c2204882f3e5.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/zuvogaju_kijoja_vadop_nafute.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://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_b365543d05524d4c93124a18a3ed8c6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da3f139-0a80-4a7d-90d9-b2c5fbd3c715/best_robot_vacuum_cleaner_consumer_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/proc_sgplot_histogram_example.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_32385e0ac8fe4cbca160f000877f2baa.pdf?index=trueIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_589f294f6d054c9ba429afdbe383eab8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/cb550_simplified_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f755f5d-15dc-46a4-a41e-80d56e17f608/fitbit_charge_4_hr_manual.pdfIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_0cfeae960546448985b10c8e6f2fab4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/fituritedovuvudukulezeja.pdfIn PDF document text
    • http://tujupifirafadus.myartsonline.com/el_camino_del_artista_en_accion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE5 4996 bytes
SHA-256: ce61010ca78eefcb28be1b0db4817672cd1faa7cf62408deb93e25b6ea38ef09
font_01_sfnt_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 19380 bytes
SHA-256: 7f13e82e1d55688abc4914376f6ef26b3673f331b41f2001087e5027862c8408
font_02_sfnt_off00010adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176