Malicious PDF — malware analysis report

Static analysis result for SHA-256 1421286224693ccd…

MALICIOUS

PDF

75.1 KB Created: 2021-06-03 05:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 65558a62350590d264c6eba05ae6dd95 SHA-1: 4335dc55b2a32af278f5aadcd11be23cb566d4dd SHA-256: 1421286224693ccdbfeab6f9d3fde11fd310aa5a13c45b1a6c6bc30886196b61
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users to potentially malicious sites. The presence of embedded URLs and the overall structure suggest an attempt to lure users through deceptive content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crewmak.ru/pbw?utm_term=onn+wireless+mouse+settings PDF link annotation
    • https://ralubimuxafoku.weebly.com/uploads/1/3/4/3/134373731/3e2c2ba33a295da.pdfIn PDF document text
    • https://puvedevedumu.weebly.com/uploads/1/3/1/4/131406841/xutodowikujafef.pdfIn PDF document text
    • https://vefotufujipewux.weebly.com/uploads/1/3/4/4/134401009/semofejirujo_zapob.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/1e7b77782f87a.pdfIn PDF document text
    • https://demiwuvaduze.weebly.com/uploads/1/3/4/9/134904833/6389390.pdfIn PDF document text
    • https://jazorematigim.weebly.com/uploads/1/3/4/8/134862517/lufelejogipop.pdfIn PDF document text
    • https://vuvunovugigadi.weebly.com/uploads/1/3/0/8/130814714/pilotaker.pdfIn PDF document text
    • https://danegatazi.weebly.com/uploads/1/3/0/7/130776269/xemokuxinita_lifonidoperuzoz.pdfIn PDF document text
    • https://megewesaj.weebly.com/uploads/1/3/0/7/130738707/nuxozenamalezazodeb.pdfIn PDF document text
    • https://wokepugef.weebly.com/uploads/1/3/4/9/134901336/d2dc0b52fba5ca6.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/lovikizi-tosuloduw-zirina-koguper.pdfIn PDF document text
    • https://mijagipiked.weebly.com/uploads/1/3/4/5/134524971/noledopulamemiwuk.pdfIn PDF document text
    • https://kiragidemi.weebly.com/uploads/1/3/0/7/130775435/jagofilovefu.pdfIn PDF document text
    • https://wozovogunetip.weebly.com/uploads/1/3/5/3/135396590/gafobe.pdfIn PDF document text
    • https://zukaxopukij.weebly.com/uploads/1/3/1/1/131164552/9933438.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://uploads.strikinglycdn.com/files/c00fe559-42e8-41dc-a0ae-1fb39e3cce40/jovifilotolubipawejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86068f2b-f8cd-4d7d-9d69-a8a521fa448d/linux_programming_language_hai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c75d079-70ad-43de-8e8f-218d17fecfe9/cuales_son_los_sintomas_de_la_fatiga_cronica.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/f/graphing_linear_systems_worksheet.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/wings_of_fire_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b6e190f-7a4a-4db6-afaf-81984c3bdffc/decision_tree_template_powerpoint.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_off0000ddbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBE 4796 bytes
SHA-256: 435535b8d5c9f33841f60307e644aec574ec9e0af185b7fb69ac1747dda816cb
font_01_sfnt_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 10280 bytes
SHA-256: 56757d3b5a2569f79329820d087dc50a098d5d794509e4cd83339766810db319
font_02_sfnt_off0001114f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176