Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc31c13c576ae12…

MALICIOUS

PDF

80.4 KB Created: 2021-02-13 14:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: eb30fd805e7f836216795a6198256d66 SHA-1: 571aa8e679bca8052c3db6cafd70ffcc142f8dbd SHA-256: 2dc31c13c576ae122ab38d2bd0233d6707e13ee877e691be601e73d370e8defa
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that redirects to a PDF file, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure for 'manual software testing interview questions and answers'. No scripts were extracted, but the presence of external URIs and the overall detection suggest the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/123?utm_term=manual+software+testing+interview+questions+and+answers+pdf+free+download PDF link annotation
    • http://legionmone.xyz/zatutebarefodibowexufumnw4o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489045/normal_5ff97291d41fc.pdfIn PDF document text
    • http://dwatches.site/phasmophobia_hide_and_seek_scary_games_onlinekbus9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469135/normal_5fe1909975136.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487622/normal_5fe03d2460ed8.pdfIn PDF document text
    • http://expressvpn.store/katufejobofulusalokuayfnf.pdfIn PDF document text
    • http://rosovutuwonemis.iblogger.org/aimp_skins_for_pc.pdfIn PDF document text
    • http://giocodigital.fun/tokesojijukixbn52y.pdfIn PDF document text
    • http://goods-amzon.com/4518596780y4m7v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralemagafi.epizy.com/geravubuwugowedoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/ferojugalezaz.pdfIn PDF document text
    • http://kusefiselarezex.epizy.com/93018802101.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/89335304051.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/28116894928.pdfIn PDF document text
    • http://gamemogap.epizy.com/sipotozalogododebemit.pdfIn PDF document text
    • http://familule.epizy.com/love_letter_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/intel_amt_scs.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_off0000fc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC94 5492 bytes
SHA-256: 7a73da75e69fbbce0b393bd3677fb9ba5a6d43deede5559b390c09effbf00f3b
font_01_sfnt_off00010f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F71 10860 bytes
SHA-256: e82f4236d3a1dbcf7e81185c87605e235399a73f57037b11439fe996c7ee1cfb

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