Malicious PDF — malware analysis report

Static analysis result for SHA-256 1711c357f3df74f2…

MALICIOUS

PDF

73.4 KB Created: 2021-02-23 12:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 89a04507225bd728796276e5af420575 SHA-1: 2524560410ef9c04c7bcb8414b26f46411379ecd SHA-256: 1711c357f3df74f21a9bb391a93b85e39a4c6712fc0291c1104b7cb99905d3e0
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI pointing to 'baarspo.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a phishing attack, likely delivered as a spearphishing attachment.

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://baarspo.ru/strik?utm_term=%25D0%25BD%25D0%25B0%25D0%25B2%25D1%2583%25D1%2588%25D0%25BD%25D0%25B8%25D0%25BA%25D0%25B8+motorola+verve+buds+100+black+tws+%2528sh052+bk%2529 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383801/normal_5ff041003e9dc.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/px7gdMw/space_jam_jumper_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487424/normal_6034a1fc14505.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/jgjh5sL/90626343407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496571/normal_5ffe7abd0d9a8.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/Dk1Rggb/simulacra_pipe_dreams_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lexuxeza/89ST2if/spirit_airlines_phone_number_tampa.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/gnQjjDV/manesakunikizexekupine.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/s8iazig/73461547842.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/g37jcge/sharpen_image_apple.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481985/normal_60071fa7d18b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bejexe/double_bass_arpeggios.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/surenebima.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/ordering_fractions_decimals_percentages_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/biodata_format_for_work.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/how_to_adjust_casio_5208_watch_time.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/bachelor_party_malayalam_full_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/rikotezodosonekane.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_off0000c26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26D 6568 bytes
SHA-256: 2cab973a8d98e133d0124758cc558d8a4a1affd3ab6a440e0f34cda005e60c56
font_01_sfnt_off0000d84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 15232 bytes
SHA-256: c8ec88dcbbdecf5efe620d88af89101013a4c6a48ee16a46ba801ec8ae588f03
font_02_sfnt_off000106f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F1 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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