Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abc0880a0446bab…

MALICIOUS

PDF

75.8 KB Created: 2021-02-02 08:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cfb27a4a5ef68a658e00db356dee3ed7 SHA-1: 9e28e181510e9d45af9092db96256951a835b19a SHA-256: 8abc0880a0446bab1a3a249ee4b1336d4fadbb7a78169f8d5c457e0f8459bd18
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 are hosted on disposable domains and appear to be part of a link farm. The primary URL, 'https://traffset.ru/wb?keyword=stupid%20zombies%203%20hack%20download', suggests a lure for users searching for game hacks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/wb?keyword=stupid%20zombies%203%20hack%20download PDF link annotation
    • http://premial.su/weekly_workout_schedule_templateszvsw.pdfIn PDF document text
    • http://big-ita.space/hot_wheels_air_attack_dragon_video4urd7.pdfIn PDF document text
    • http://nususolajegak.iblogger.org/wobutavujukuzajabatugi.pdfIn PDF document text
    • http://crysety.xyz/dejagadvkklp.pdfIn PDF document text
    • http://idealica-tufficiale.website/72591578863micet.pdfIn PDF document text
    • http://kivudutamazawan.22web.org/vitamin_d_deficiency_treatment_guidelines_2019.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/181277b84ae.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/c02f23bf.pdfIn PDF document text
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/bd157e8.pdfIn PDF document text
    • http://tb-films.ru/tinder_apk_older_versions7ga6d.pdfIn PDF document text
    • http://akfb.online/dragonvale_world_dragon_evolutionzmy45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483082/normal_60033f8ebe723.pdfIn PDF document text
    • http://ryduslim.website/muwuwimozi40liu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natetiko.epizy.com/standard_kitchen_cabinet_dimensions.pdfIn PDF document text
    • http://boxugajot.rf.gd/sri_basavalinga_avadhoota_audio_songs.pdfIn PDF document text
    • http://mapexas.epizy.com/kiwazonesakuzodabumuxexa.pdfIn PDF document text
    • http://kiralemosokeze.epizy.com/33108281800.pdfIn PDF document text
    • http://veluvuwipigunuw.rf.gd/lopazeberadejolaxilinalet.pdfIn PDF document text
    • http://vijanemafe.rf.gd/guidecraft_dress_up_storage_center.pdfIn 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_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 5828 bytes
SHA-256: 501929caf656d8c51bf3fdd31add8fd7619255a7124458760ee88aef3f63ccad
font_01_sfnt_off0000fdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 10588 bytes
SHA-256: 9651959efd866a50cfe7a69eaaa68d5166047a75cdf2fd796a7841d91430a95a

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