Malicious PDF — malware analysis report

Static analysis result for SHA-256 1548a2fde2b2f3dd…

MALICIOUS

PDF

74.5 KB Created: 2021-03-23 02:54:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5e70ad452efa54bdcc37e0a6fc638a80 SHA-1: 6ec2eac3a6385963c7720e99f43442e6489c8768 SHA-256: 1548a2fde2b2f3dd727beff582fe754cb7abe6d7576fcf0d8e01845532e46ccb
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, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct instructions or lures are discernible. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=how+to+pour+implant+impression PDF link annotation
    • https://cdn.sqhk.co/fuvebopeweb/AOB1igS/33564323713.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/jelebesolumumar.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/dTQXggb/splat_weapon_roulette_2.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/jgjrDnt/wrestling_revolution_pro_apk_uptodown.pdfIn PDF document text
    • https://gufuvixenize.weebly.com/uploads/1/3/5/3/135387571/xuviz.pdfIn PDF document text
    • https://cdn.sqhk.co/soribivevi/icjgegc/turbo_vpn_private_browser_nedir.pdfIn PDF document text
    • https://roguvajodanuk.weebly.com/uploads/1/3/1/3/131379692/xitozixopu.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/ibia1id/tiniveladaka.pdfIn PDF document text
    • https://cdn.sqhk.co/sesudegaruta/OthaxAf/first_words_of_rock_of_ages.pdfIn PDF document text
    • http://getveran.site/what_is_the_coldest_city_in_the_world_right_nowac3xd.pdfIn PDF document text
    • http://wide-take.top/733739087473kwvf.pdfIn PDF document text
    • https://funobijego.weebly.com/uploads/1/3/1/6/131636789/wibewupuvabav-pevilivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_ce5631356566460aa588d5cf09c8463a.pdf?index=trueIn PDF document text
    • https://51364a6b-283d-4537-b9df-48522fd8faf2.filesusr.com/ugd/921180_a1279261f0a2490fbc2535113eff684d.pdf?index=trueIn PDF document text
    • http://bifajone.rf.gd/watifujutofubek.pdfIn PDF document text
    • http://kokutefuto.epizy.com/what_is_meant_by_management_skills.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_173a49ba6a084e82802bacd6d5748a22.pdf?index=trueIn PDF document text
    • http://vaguxaza.epizy.com/49511727555.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_ad3957766d3d4924aa619d89b54399ee.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_off0000e798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE798 5016 bytes
SHA-256: fdcb14710a909d091fff51a58df47415bf9e14a9b85cb606f31c663234e786c1
font_01_sfnt_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 10584 bytes
SHA-256: 0c5bce29855534fbe2b8df547a85e4f71d55aa2f719583949d508eb9b4b1ec9c

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