Malicious PDF — malware analysis report

Static analysis result for SHA-256 e126310fb5d679be…

MALICIOUS

PDF

74.2 KB Created: 2021-03-07 22:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 752efe94db5329b1ac80f6f9249fe50e SHA-1: df7746fc30a97887bb03db80405d65c892f897c2 SHA-256: e126310fb5d679be1a0cca54b3f58ccd2ae407c06efc17db3866562fc871895d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, appears to be a lure related to assembling a grill, but the primary malicious functionality is likely delivered via the numerous embedded URLs pointing to disposable domains, which are characteristic of phishing or malware distribution campaigns. No scripts were extracted from this sample, but the PDF structure itself contains many links designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://kuzutuzo.ru/strik?utm_term=how+to+put+together+george+foreman+indoor+outdoor+grill PDF link annotation
    • https://cdn.sqhk.co/keridola/0RggEtr/tewawiri.pdfIn PDF document text
    • http://megatorg.ru/email_etiquette_questions_and_answerswsx2s.pdfIn PDF document text
    • https://gonufefimexej.weebly.com/uploads/1/3/4/8/134892828/julefilotizapili.pdfIn PDF document text
    • http://youla-24.cc/wallpaper_kartun_lucu_untuk_android3c2l1.pdfIn PDF document text
    • https://cdn.sqhk.co/wizevomorofe/mggiiib/factory_for_avatar_apk.pdfIn PDF document text
    • http://benodemutuvi.22web.org/tifofezuzedimixidevu.pdfIn PDF document text
    • http://nijeratazuw.iblogger.org/cuantos_medios_de_comunicacin_en_el_salvador.pdfIn PDF document text
    • https://xoxawipexari.weebly.com/uploads/1/3/0/7/130775732/9764460.pdfIn PDF document text
    • http://baby-slings.ru/drumstick_recipe_barbecueez8b9.pdfIn PDF document text
    • http://ferejupaxebul.iblogger.org/bacillus_cereus_treatment.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/ar471ie/pocket_door_kitchen.pdfIn PDF document text
    • http://eagleaff.com/besanelebuzalidbeki8.pdfIn PDF document text
    • https://muverope.weebly.com/uploads/1/3/0/7/130776407/2dcf555.pdfIn PDF document text
    • http://conicppjry.bid/79141769466sbx29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3638b2e5-1b8a-47cc-903d-e1b1025993ad/78297997296.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_4b767394af554ecf927f54e3d636cd2d.pdf?index=trueIn PDF document text
    • http://ziperajotuvap.rf.gd/lagu_akmu_sailing_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/addb5630-dca8-4749-9198-db82c67d1296/dunkin_donuts_cold_brew_packs_calories.pdfIn PDF document text
    • http://ruguwozud.epizy.com/rifugug.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_62cdf12f1bc64395813f51ba5a41a05b.pdf?index=trueIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_5b90a97781264e0c898567453ea454d4.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_off0000e67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67A 5332 bytes
SHA-256: 7adbc9a35a8fee805ede0bc1268721cf240967df83f7c5c43eb77025a186db19
font_01_sfnt_off0000f883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF883 10172 bytes
SHA-256: 5fe3788396e2a2e0a1166cf18e089c3ea5864cc2cffaed68633ac7cdbeac6d2b

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