Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa34ba4d398b9a1…

MALICIOUS

PDF

78.1 KB Created: 2021-04-02 19:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5c93a41565dd97d40f65b9e225b93c53 SHA-1: feaeedda5c0a5b64e213ed83a0ed0f522983e9b5 SHA-256: aaa34ba4d398b9a10dc114242c97ff19f6de9a1505463325b1cf16efa1425b52
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/award?keyword=angel+of+death+tab+pdf PDF link annotation
    • http://russianpatentexpert.com/what_are_the_main_components_of_a_business_reporting_systemzw6ks.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/gciPZji/guitar_ringtone_malayalam_movie_bgm.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/B78jhct/knights_templar_holy_grail.pdfIn PDF document text
    • http://zenisir.22web.org/34066516893.pdfIn PDF document text
    • http://natlab.ru/kajizi1a3je.pdfIn PDF document text
    • http://pejurazatox.iblogger.org/building_construction_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bad929e-0b3d-4b62-bc75-498f0e8a001e/wubanejesag.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/blue_prism_mapiex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5098540-9198-4f75-95f4-119d8585bce3/vafekukumemumoderovukivi.pdfIn PDF document text
    • http://makosowuru.epizy.com/lerokevoripefadoritusa.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/zagg_slim_book_with_keyboard_ipad_mini_4.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/caulfield_cup_field_and_form_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5ecaf9-68e3-43ac-9253-ae72d7ac118f/gre_test_prep_courses.pdfIn PDF document text
    • http://bedanodog.rf.gd/94773556107.pdfIn PDF document text
    • http://wegemejejo.epizy.com/xugepefumuru.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_5eabe3d82baa443b8a196852cd815714.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_a51f62b6c379475082980d74ec0ba9b0.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_3503c3ade74649c88c7ac2c1b8284961.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/447bb333-a2da-41ac-86c3-31cf5fd515c7/gokol.pdfIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_39243ebafa6944b798b7fd29cd9507da.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/698270df-6153-4172-a35d-064b17ef09fb/funebemadedipiwoxaderi.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/2833556437.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_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 5160 bytes
SHA-256: f5c8e024406f2f33efb54fdd35a0d8d4a18d3d419adeea7f37ef5cba21fc5b3a
font_01_sfnt_off0001074c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074C 10456 bytes
SHA-256: afe07ad74da3d7512471c42b2f9589c2da7480083c8fc0b21e4c0d730fc257b5

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