Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f548aba0a5b3eab…

MALICIOUS

PDF

94.7 KB Created: 2021-03-23 05:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7b5df7eb95e49d17d51bc85af9cd07fc SHA-1: 562ba257292eae7ebd08f746c0dd78756361b3ed SHA-256: 4f548aba0a5b3eabe16365cf288416e692c75d6bb3a2032be198da34e9fa5574
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URLs, including one that appears to be a phishing lure, suggests the document is designed to redirect users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=4th+kalima+transliteration PDF link annotation
    • http://vbnmcxz.xyz/kenmore_washer_and_dryer_stacking_kit6hot9.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/hdhiEQs/vakepode.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/ZahfEca/48925932310.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/troy_bilt_pony_will_not_startqn7uh.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/dNgtALb/dabun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480876/normal_605914ff19135.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/85914018786.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/eHzwOUl/5082159514.pdfIn PDF document text
    • http://xtreme-sport.ru/bootable_windows_7_imagex5key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_602a8b6dd39d2.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/bazibonezewusufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_60112782612f6.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/wupuxus/14612342821.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/dining_on_a_dime_cookbook_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/58609699589.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/3357113575.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/tabletop_rpg_gaming_accessories.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/passport_application_form_editable.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/angular_reactive_form_validation_regex.pdfIn PDF document text
    • http://revodez.myartsonline.com/sozotafugaxulazutobije.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013d54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13D54 27376 bytes
SHA-256: f171e73b8f78a39757d570147d875000121e110402f13c56302db820d8df139d
font_00_sfnt_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 4980 bytes
SHA-256: df2429fe17226f1815bcc72e0bb352ac8c60011873c45428d922374b37779ca5
font_01_sfnt_off0001159d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159D 12444 bytes
SHA-256: 54fe3cb41fb1d9d827cd4bf5e58388a8042ce6ca2e1b5081285456b40c583949

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