Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffe8e9ed5d3dedf…

MALICIOUS

PDF

72.1 KB Created: 2021-03-02 01:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 089dd26eeacf3d7bb20b06316ca1e08e SHA-1: 38ceccf45d8c169a84ed5c4f351025c224fbfb62 SHA-256: 7ffe8e9ed5d3dedf6321fc21cb2e961687d2cfe70ba4f1564ab47312b16af23c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'CLAMAV_DETECTION' heuristics. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

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 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.
  • 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://gimoguvi.ru/strik?utm_term=how+much+money+do+storyboard+artists+make PDF link annotation
    • https://cdn.sqhk.co/dawolesirip/jZjfOjd/punanojuwoxilujawazas.pdfIn PDF document text
    • https://gokejubekilebu.weebly.com/uploads/1/3/4/3/134376129/5072023.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/dc9c3078fdd1.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/hifuji9/tier_list_maker_smash_ultimate_7._0.pdfIn PDF document text
    • http://ighelpcenter.xyz/rca_rt2781hb_remote_controla6nej.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/Phb7gji/kusorawu.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/basic_math_aptitude_test_with_answers.pdfIn PDF document text
    • https://biruwilajefi.weebly.com/uploads/1/3/4/6/134651793/loripanumu.pdfIn PDF document text
    • https://dakuwiremab.weebly.com/uploads/1/3/4/9/134901294/a80b8dbf5e57.pdfIn PDF document text
    • https://kamowomol.weebly.com/uploads/1/3/4/3/134371521/bepedeweponewakolig.pdfIn PDF document text
    • https://cdn.sqhk.co/bofogarabu/lhbiJgi/nuzukazaj.pdfIn PDF document text
    • http://clubstore.pro/40489017825ees42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xirixepo/ms_word_add_style_to_table_of_contents.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/lamuraxejibavadarimom.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/christmas_songs_free_boney_m.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/letexevefopifodebi.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/abbyy_flexicapture_11_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/vamomubupa.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_off0000dcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC5 5504 bytes
SHA-256: 054467a34fecf35cbe1cc269326e7b704f118b5184b611bab5265c240b7cfb01
font_01_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 10468 bytes
SHA-256: 3f7c363708bf50f3c44e3b822ccd8801af05536e73dde07c8bf1c075a7dd9729

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