Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8dbb5e742fb4e6…

MALICIOUS

PDF

81.4 KB Created: 2021-02-28 08:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a545bff9bd5aa07c05822fbaf482e082 SHA-1: a2c778787d8029fd11ba62c3df0052d8a06760a9 SHA-256: 6f8dbb5e742fb4e626caddfabce866b67cad0c9704caaafd1641bf696462b19c
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to semiconductors, directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=what+is+semiconductor+mention+the+two+main+types+of+semiconductor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471479/normal_60029500280f9.pdfIn PDF document text
    • http://pomirkapa.site/44093839459jyqmc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387939/normal_600984c94364b.pdfIn PDF document text
    • http://gbarb.me/67490801355sotb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601cf9b290a1b.pdfIn PDF document text
    • http://canonsburglake.com/3002985428708w61.pdfIn PDF document text
    • http://simcars.ru/15277672993ai15u.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/bugutaj/4577354055.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/gefabimusanoxim.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/38577477756.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/allianz_insurance_claim_form_qatar.pdfIn PDF document text
    • http://telaratar.epizy.com/handwriting_worksheet_maker_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/88609193031.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/sanifopusosa.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/challenge_bhojpuri_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/introduction_to_sociolinguistics_janet_holmes.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/zojavemasob.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/kokima.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/pajazibibezupopazemenaku.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/first_information_report_meaning_in_gujarati.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_off0000ffff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 5568 bytes
SHA-256: 0dba5e0bcf5ff91969f0f914b54436d7ccff8b772ab66a0db620ab0d183fc906
font_01_sfnt_off000112e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E3 10676 bytes
SHA-256: 9fbdc61738d7702ad30d683267801e592b99cc99e61ddd8fdf25437c62578045

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