Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d74fd0c90f68746…

MALICIOUS

PDF

75.9 KB Created: 2021-02-25 00:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a7e385600b5ab26a136f61c049a341a1 SHA-1: 229699e715f4c3ad104b2d725510364186dd24c1 SHA-256: 2d74fd0c90f68746dbf307b73aa8cb08e95ee6a8569aa2e624a222ee985520ca
184 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical alert for malicious redirector links and a high ML score. The presence of numerous links pointing to disposable domains and known malicious redirector infrastructure strongly suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the nature of the links and the PDF structure indicate an attempt to lure users to external malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=engineering+drawing+boxed+dimension In PDF document text
    • http://kanaxade.mygamesonline.org/42681165130.pdfIn PDF document text
    • https://guwawafike.weebly.com/uploads/1/3/5/3/135338161/6642330.pdfIn PDF document text
    • http://7lessons.website/12_snf_karlatrmal_dinler_tarihi_kitab_cevaplardszv3.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/star_wars_bookends_han_solo.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/gajavunolovamabenunif.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/fusebofezesijunori.pdfIn PDF document text
    • http://com-signto2.xyz/bengali_movie_servere7k4c.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/b933d4f016ddb17.pdfIn PDF document text
    • http://detonic-ordina.website/degogufofoy5dpv.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/planificacin_estrategica_de_mercadotecnia.pdfIn PDF document text
    • http://prod-fruit.space/casio_ez-label_printer_kl-120_manualmdf24.pdfIn PDF document text
    • http://yandex-delivery.cc/corey_wayne_3_man_audiobookbw3te.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/f494c1f.pdfIn PDF document text
    • https://kexezesokofu.weebly.com/uploads/1/3/3/9/133986719/koxopedepajulukek.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/29401935538.pdfIn PDF document text
    • http://vzale.ru/stay_alert_definition_synonymsoyttl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mafatiwi.rf.gd/descargar_whatsapp_plus_azul_para_android.pdfIn PDF document text
    • http://juwozevukiri.rf.gd/chammak_challo_video_mp4.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_off0000eae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 5368 bytes
SHA-256: 1bd2c0ff42538f39ecdf137cc6e78ed0f7532a99d1feb7e44d14d556fc42e011
font_01_sfnt_off0000fd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD28 10920 bytes
SHA-256: 5f98806f1bea5e247c9350719305bbf600760813cb867128c7af942c1208ba55

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