Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f25e949c01bc88…

MALICIOUS

PDF

80.9 KB Created: 2021-04-02 05:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6078d0d7837f53f67a7cd2bcc988ae42 SHA-1: 5808ee2b9395f39cf0ff749ff98a637894e69d75 SHA-256: 73f25e949c01bc883c1dcd053f5ab80243351d5c0bd91c8d733880bc0cc137b2
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF documents, many of which are hosted on disposable domains. The primary URL suggests a lure related to downloading software, indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/wix?keyword=despicable+me+minion+rush+apk+unlimited+money PDF link annotation
    • https://cdn.sqhk.co/wolowivem/aaq2ev2/80124903225.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/february_2020_calendar_printable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fd635ce40e10.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/a21f195b2b046e0.pdfIn PDF document text
    • https://sobomimaseneke.weebly.com/uploads/1/3/1/3/131379860/jototefogubamixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479436/normal_604f71e915a10.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/4Fthhgg/7269325965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374976/normal_5ff8583e4de4f.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/Mijf2nZ/braiding_hair_salons_in_atlanta_ga.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/kakoravapojisodozab.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/YjdpFHd/30627534166.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/wm5ggji/multi_block_craft.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxazigozo/grmggeY/joxevipimixonogitu.pdfIn PDF document text
    • http://difanitukovu.mywebcommunity.org/cdf_and_in_probability.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529024/normal_5fe16a6802057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490001/normal_603e41ae7eac5.pdfIn PDF document text
    • https://metekazup.weebly.com/uploads/1/3/2/8/132815755/nepawigaju.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/ChbqDCe/gezogo.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/history_of_africa_before_colonization.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/ajiLhh0/neighborhood_jam_waitlist.pdfIn PDF document text
    • https://lotekine.weebly.com/uploads/1/3/1/3/131381428/fea34d3395.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://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_624e005a697248cab224da798fdaa02b.pdf?index=trueIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_6666a0f919034c388e6c169523be817b.pdf?index=trueIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_30e61a12822b48daa466fbd3d6b58f46.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_bdd5b095059a4a7eb4d0fad98d2b3245.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 5500 bytes
SHA-256: b9c23b8aef1346951b411a35abf5b76a271d0bc5aad3e8e0436bcdaa626d519f
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 10728 bytes
SHA-256: 313318434eaa0292899c61c90971b780b5e006eb4aa9e9b758c40917abee5862
font_02_sfnt_off0001256e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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