Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79e301057d4d19c…

MALICIOUS

PDF

84.6 KB Created: 2021-03-21 21:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0ead5e3338f337ac8f8a316a9f2b625 SHA-1: 5d5f3cb325b354c14ec1eb699bcbd3f11d0c80d7 SHA-256: d79e301057d4d19cf72babc2c63c29864c629ea98c6bda8f47c86fbb584a4942
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/award?keyword=ketogenic+food+plan+pdf PDF link annotation
    • https://cdn.sqhk.co/takabalal/eCqhjhc/nearest_halloween_costume_store_near_me.pdfIn PDF document text
    • https://gimogelego.weebly.com/uploads/1/3/4/6/134601730/bdf6c.pdfIn PDF document text
    • http://luwakixifotizim.iblogger.org/38766338211.pdfIn PDF document text
    • https://puxugewukuniw.weebly.com/uploads/1/3/4/4/134492634/91115f8.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/iiegjbZ/always_on_display_samsung_s6_apk.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/wuwokugilimutipaxo.pdfIn PDF document text
    • https://jukaregexiw.weebly.com/uploads/1/3/2/8/132816195/pelosabem_raxisawadez_gugatofanif_baveboza.pdfIn PDF document text
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/dobuluz-fowabuguzakiki.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/k0ijibd/11428059605.pdfIn PDF document text
    • https://nuzaguwimera.weebly.com/uploads/1/3/4/4/134492670/b3f1907a495e.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvutose/BLkjghi/earl_of_sandwich_las_vegas_yelp.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/BChb1hM/lirigufuwigutikafiw.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/faadc324-1548-44bf-85e9-32f23a5f07d9/31338961360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c1fb552-aae8-4517-bf60-69d4d427b55b/77832632773.pdfIn PDF document text
    • http://jupanev.epizy.com/are_the_harry_potter_movies_similar_to_the_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6341c386-7b4f-4f67-a085-389f45cf70e0/rifts_game_master_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd18979-6204-4f19-a142-9c52030f7913/positive_thinking_meaning_in_urdu.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_off00010e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E15 5016 bytes
SHA-256: 4ecfe44ff9be537c2c3f0c7ae8b2da1a784cde44ea75ae3b458f0cab9aa2f01e
font_01_sfnt_off00011f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F50 11344 bytes
SHA-256: fc86bba7cf1ef383c9fccdbeb9ebf213f158d8ec4cbc66b3185dd0f8698a7de1

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