Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bf8855655da774…

MALICIOUS

PDF

75.3 KB Created: 2021-03-10 01:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 14a0b4964f3e411eb0b7731220dc0317 SHA-1: dc53ccf4ff3482e2b71d28c8ea7701bdd5ae96e9 SHA-256: 02bf8855655da7746357855671b6634ea63807a72d49d94340b1ad5269f6f137
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO spam operation. The embedded URLs and the document's structure strongly suggest an attempt to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/strik?utm_term=what+kind+of+oil+goes+in+a+generator PDF link annotation
    • https://cdn.sqhk.co/gotubosif/whcbijS/1998637676.pdfIn PDF document text
    • http://buviturowugigew.66ghz.com/rca_dvd_player_surround_sound_remote.pdfIn PDF document text
    • https://laboxowoxom.weebly.com/uploads/1/3/5/4/135400847/0e02e3740.pdfIn PDF document text
    • https://simefaburiso.weebly.com/uploads/1/3/0/8/130814859/7d63c.pdfIn PDF document text
    • https://xaburopufazig.weebly.com/uploads/1/3/6/0/136051881/soxazu.pdfIn PDF document text
    • https://tutemedoz.weebly.com/uploads/1/3/2/8/132814241/zalidabulex.pdfIn PDF document text
    • http://rozivoladavabog.iblogger.org/51180063802.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/jhgjgjb/zoriwozekozilowir.pdfIn PDF document text
    • http://perakaganiw.iblogger.org/bizubatufopakuru.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/tabuwerope.pdfIn PDF document text
    • http://subikizivuwen.22web.org/project_calendar_template_excel_free.pdfIn PDF document text
    • http://mukidulutovig.iblogger.org/dyson_v8_animal_cordless_stick_vacuum_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/cjlU7hb/83696389933.pdfIn PDF document text
    • https://cdn.sqhk.co/xezalagefog/dsYOo7I/fakodusuxetugafadekuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubiviv/Ys6gg64/fishing_predatory_carp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nirisibibeso.epizy.com/52629142807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18d09c1-eed3-462c-b80f-3a8c24342d56/are_inflatable_hot_tubs_worth_it_reddit.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/dublin_breeches_size_guide.pdfIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_c1df0d967a6749d1aa45064d6565fbb8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b09d7ff-46cf-4575-9c76-dde33983193e/free_diablo_2_lod_cd_key.pdfIn PDF document text
    • http://fepufikegag.rf.gd/why_wont_my_garage_door_opener_light_come_on.pdfIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_dca3e66822164ea2b8a787b9021ddca7.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 5244 bytes
SHA-256: 0c8569ca6f678911cbf4bbeb5042e9fa8837847ca95e470e581f879c2b686c46
font_01_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 10796 bytes
SHA-256: 130260f36e5bbd9040dfcf1a456d6dde4b26297b55b1938bcaec065f08fb9480