Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdd686a5cd8ab18…

MALICIOUS

PDF

87.8 KB Created: 2021-03-02 00:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0233725be0f8a14201dae9eac699b611 SHA-1: 906e55bc2ef7e5fdd0d109b8248f874d6c14ad67 SHA-256: 9bdd686a5cd8ab18a4b8f026f2f00f922703386797e22c6d4959c578cf8e8351
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic. The presence of a URL related to 'limewire pro full cracked' indicates a lure for potentially malicious downloads. ClamAV and ML classifiers confirm the malicious nature of the PDF, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=limewire+pro+full+cracked PDF link annotation
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/df5b60.pdfIn PDF document text
    • https://tevukebejesa.weebly.com/uploads/1/3/2/6/132695492/vusinasakizelunogibu.pdfIn PDF document text
    • http://puliliraforuwu.22web.org/rerolowawisiru.pdfIn PDF document text
    • https://dedidebu.weebly.com/uploads/1/3/2/7/132740692/pozukogi.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/gdhfwia/.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/ijQkPTS/word_trip_luxembourg_chopper.pdfIn PDF document text
    • http://pabixigenived.22web.org/kuwonemelagabobejona.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/gh3Xshc/46137583933.pdfIn PDF document text
    • https://nawivavunof.weebly.com/uploads/1/3/4/6/134669961/898227.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/ckjeibo/moneygram_inside_cvs_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/iahjidv/dr._vivek_bindra_age.pdfIn PDF document text
    • http://fidisop.22web.org/26828364193.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jagodamafa.rf.gd/manually_open_xbox_360_s_disc_tray.pdfIn PDF document text
    • http://fesemuk.rf.gd/68091618964.pdfIn PDF document text
    • http://sulupajus.rf.gd/binkw32._dll_gta_4.pdfIn PDF document text
    • http://fakopasetiboni.rf.gd/canzoni_per_bambini_gratis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1D 4880 bytes
SHA-256: ce817f6856547ba41bc09597d541bd7e15800317af7b29c1a950e8e3463318f4
font_01_sfnt_off00010e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E14 5220 bytes
SHA-256: 8f99722dcd930c8cbeab53a32cf895fe16f93b9e1c07f64bdc89e1cd21397d12
font_02_sfnt_off00011fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD6 16180 bytes
SHA-256: 8393cb139533d6f58b6dd0fc9e2afd3c9aa4143a57208b7edfc2813626d0cc06

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