Malicious PDF — malware analysis report

Static analysis result for SHA-256 045a424b5ee9caa2…

MALICIOUS

PDF

65.5 KB Created: 2021-02-17 16:14:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c9f654dd744339ae3bea5ef7573344a7 SHA-1: f03572d4d8c9a5f847d60ca5ad68d540815fc281 SHA-256: 045a424b5ee9caa2257a9d370106897e3e0597e1bb711ff177a860b5b4d52f85
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://druttle.ru/strik?utm_term=simmons+rowen+crib+instructions', which is likely the primary lure. While no scripts were explicitly extracted, the PDF structure and the presence of external URLs suggest it's designed to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=simmons+rowen+crib+instructions PDF link annotation
    • https://cdn.sqhk.co/patagarinixa/iiialig/versace_chain_reaction_shoes_grey.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/7ihL6ij/28218153077.pdfIn PDF document text
    • https://cdn.sqhk.co/bubuzibiv/gf8Cii0/fitbit_inspire_2_clip_heart_rate.pdfIn PDF document text
    • https://cdn.sqhk.co/xakutofi/hglzQG4/nbc_sports_chicago_live_stream.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/egdJcFD/78456182539.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/AodJggH/furevaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/gcjOCI5/4034307419.pdfIn PDF document text
    • http://helpcreditscore.info/a_connecticut_yankee_in_king_arthurs_court_book_reviewxnsv0.pdfIn PDF document text
    • http://creditstar-kabinet.com/printable_affirmation_cardsy5dvk.pdfIn PDF document text
    • https://cdn.sqhk.co/vusopukov/jwfMzgj/pilafamofiroj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5ff107f6c9ac4.pdfIn PDF document text
    • http://everydayy.fun/grade_6_math_decimals_worksheets37byl.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/ejghdhf/fulonojogawepiragakadigir.pdfIn PDF document text
    • http://tosety.xyz/86773532715y8i20.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/nazekisigiduz/jajeratodaludunufi.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/tafedowozupunumar.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/8938805912.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/hyperion_insurance_group_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/jovojotezu.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/1942789134.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/16665070750.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/koxisavunutolapuletaf.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_off0000c339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC339 5040 bytes
SHA-256: c937608bf4b5dbd21a47291f06001dd4d916708db3e35b62e3d1a70e889d6db2
font_01_sfnt_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 10320 bytes
SHA-256: 968b8c91f2ea81b3eea1d3e0602c80a6c2cd89e56c52c2bde4936ebf2a929214

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