Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fa3c3b0007ff5e…

MALICIOUS

PDF

79.0 KB Created: 2021-04-26 12:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 01925761df428ec0d4e0612a0b02a366 SHA-1: 8ad5669a44ab296605e01fae627285c310642410 SHA-256: 05fa3c3b0007ff5e81612b972f043c82cf4026010b3a1ebbb7fbeb8a8997b6e1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=harry+potter+book+review+goblet+of+fire PDF link annotation
    • http://idclick.cash/83540125760aq2ta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421770/normal_5ffaafae54c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_603584382da1c.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://podarokinsta.site/what_is_the_richest_state_per_capita_in_the_usjoijy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424036/normal_603b760bb5333.pdfIn PDF document text
    • https://daxixulo.weebly.com/uploads/1/3/1/0/131070202/1975038.pdfIn PDF document text
    • http://lezapogogaz.iblogger.org/61582392128.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/jane_austen_pride_and_prejudice_audiobook_free_download.pdfIn PDF document text
    • http://xebubux.sportsontheweb.net/annotate_on_ipad_free.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/visexodifekugivigitusuwefy5y57.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/68466691375.pdfIn PDF document text
    • http://mscredit.info/dumusumexepixulipeg7qyr6.pdfIn PDF document text
    • https://xajifopuref.weebly.com/uploads/1/3/3/9/133999146/6e02cd146982d.pdfIn PDF document text
    • https://nigenodesi.weebly.com/uploads/1/3/4/4/134480521/bcfb229.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/usg_all_purpose_joint_compound.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_6034d66132608.pdfIn PDF document text
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/653e98ca7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9aef9be9-4304-4ec6-b02b-ded1eabc5d1b.filesusr.com/ugd/a571b8_bdce9b515881464d8fa0984867e16b2d.pdf?index=trueIn PDF document text
    • http://tenovelipa.rf.gd/inc_bsc_nursing_syllabus_2020.pdfIn PDF document text
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_083cf8f4123c42d590cdc8564e1be3e1.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_f2fd84bba2974fc7a4e62abe3e071ac3.pdf?index=trueIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_9f15ab1c58834b78b6f02e09e340d714.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_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 5308 bytes
SHA-256: bd488b15d63d604bddc43bbdf4490a6db1b407d7e223dbf139143d37e0227c31
font_01_sfnt_off00010602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10602 11440 bytes
SHA-256: 5d3d1a0a5be0debd8281bd8b5eef22c4dadc337145b350203ad291f4334050d9

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