Malicious PDF — malware analysis report

Static analysis result for SHA-256 95de4a6b168901f2…

MALICIOUS

PDF

86.6 KB Created: 2021-03-17 10:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 98abecc1f9d576a3a7336c48df27ffa3 SHA-1: b93ce40541f291eb987a9d2b75a1f879367a46e7 SHA-256: 95de4a6b168901f20221cd08d8c9b7a81d05c2c65bcd65bb38a7d26333eb3269
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs pointing to various PDF documents, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of multiple disposable hosting domains and a high number of links per host indicates a coordinated effort for potentially harmful purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=pythagorean+theorem+activity+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/futipujorup/hDjeLhi/pop_up_camera_phone_under_10000_flipkart.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/hlt5Zjd/retrograde_flow_medical_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/ihDPyie/is_fortnite_the_worst_game_in_the_world.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/ba8f0daa9d1368d.pdfIn PDF document text
    • https://terabuzaxora.weebly.com/uploads/1/3/0/8/130814115/vizare-nebufagetupev-pubuz-pofegalepiwozi.pdfIn PDF document text
    • https://mevajivikupewog.weebly.com/uploads/1/3/0/7/130775189/jofogidix.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/4H5aJid/1003825741.pdfIn PDF document text
    • https://miwolugakibu.weebly.com/uploads/1/3/1/3/131383652/luwebovuf.pdfIn PDF document text
    • https://gikanirirexenad.weebly.com/uploads/1/3/0/7/130776133/4cdf3de.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/jgjejfe/business_impact_analysis_process.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/dgeFhdF/walmart_investor_conference.pdfIn PDF document text
    • https://xatuvapezorix.weebly.com/uploads/1/3/4/5/134595272/4444447.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/merobukujemujuturexa.pdfIn PDF document text
    • https://kegixofuwo.weebly.com/uploads/1/3/4/5/134577478/4056637.pdfIn PDF document text
    • https://cdn.sqhk.co/loziromegon/RnQidgc/gixud.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/7ijo5LS/noforegesul.pdfIn PDF document text
    • https://susutabum.weebly.com/uploads/1/3/4/4/134464128/siratajaruwuzo_puzekisetawav.pdfIn PDF document text
    • https://cdn.sqhk.co/wodegamido/gghdphi/broken_angel_song_ming.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://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_9c33ea5889c342a1b8df1533fd3c68a8.pdf?index=trueIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_8bf6700ad58f49d5960f5d82c8660795.pdf?index=trueIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_d7d87eac9c4e47d5aa85a44dc24e0fd0.pdf?index=trueIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_b7edec36db164195af0bf935cd58d029.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 5644 bytes
SHA-256: 0bdc610ef2c3fef6ea4b9e7b7f0156365646fa21295439080b513a9670749f78
font_01_sfnt_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000117b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B4 10800 bytes
SHA-256: 224ab2e80059668bf732413373fda276f7a387d590163944027c391e10a93ca2
font_03_sfnt_off00013c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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