Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb1c562159df9a9…

MALICIOUS

PDF

88.0 KB Created: 2021-04-01 02:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 302ea562f358efce5fc49ce784cd61f6 SHA-1: 7e29ed771b87d217a705d6122744154b0afffe25 SHA-256: 4fb1c562159df9a98e42ad743fbe1a30591c092d9fcb8c6067c29dfbafd54e59
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, directing users to various websites. The heuristic PDF_SEO_LINK_FARM and CLAMAV_DETECTION (Pdf.Phishing.Trojan) strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs, such as https://lozipotod.ru/123?utm_term=video+editing+program+mac+free, are designed to lure victims under the pretext of offering free video editing software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=video+editing+program+mac+free PDF link annotation
    • https://lezisonesu.weebly.com/uploads/1/3/5/3/135339892/xefowogilop-verelir.pdfIn PDF document text
    • https://somigoduwus.weebly.com/uploads/1/3/4/4/134470899/girovazitojifetifi.pdfIn PDF document text
    • http://vukabakoxipus.22web.org/51782093706.pdfIn PDF document text
    • https://gumijaxedug.weebly.com/uploads/1/3/4/5/134529094/9476b0c17204e.pdfIn PDF document text
    • https://divisekul.weebly.com/uploads/1/3/5/3/135347680/robamididi.pdfIn PDF document text
    • http://bigmagazin.xyz/how_to_fix_lg_sound_bar_subwooferpm4di.pdfIn PDF document text
    • https://lonaxixa.weebly.com/uploads/1/3/1/4/131413275/9021412.pdfIn PDF document text
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/8d3bf507973716e.pdfIn PDF document text
    • https://fotelosalif.weebly.com/uploads/1/3/4/4/134463398/4730b527.pdfIn PDF document text
    • http://everydays.space/78834119747cekly.pdfIn PDF document text
    • https://kuvugelovusilu.weebly.com/uploads/1/3/4/4/134437140/1612707f.pdfIn PDF document text
    • http://vixifujugafafin.iblogger.org/35497773786.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/lumixi/background_wedding_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/metformin_ampk_agonist.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_274add6ef5c84377b2949aea05c4602f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabom/android_device_recovery_software.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/what_are_some_safety_features_in_a_car.pdfIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_2f065b40a6f845a283a52f4195ff71c2.pdf?index=trueIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_fadce0813ab3416d96d6faf5be971e10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/lofitibagefopanaruvi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E3 5232 bytes
SHA-256: 821bb5ccda2d9c2d642a18915a524600c4ce9ab9faa2f235a58689717bdedeb8
font_01_sfnt_off000118a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A9 10860 bytes
SHA-256: d98d118afa78d0373af134b2e3749e01d04d5e724365afdb5a7b3da69432ca69
font_02_sfnt_off00013de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE1 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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