Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef2d29eea7cd20c…

MALICIOUS

PDF

83.4 KB Created: 2021-03-11 05:55:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1f5e54e22ff05f9dfb05f0b2fbf2091e SHA-1: ce8efe14e00a7868a921614a497b45dff5985df5 SHA-256: 1ef2d29eea7cd20cbc9f4635926b5e4317cee41befd0d6ee5293871011838f58
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 0.9993

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://nipisod.ru/award?keyword=attachment+adalah+pdf PDF link annotation
    • http://tesevamomavuruf.22web.org/thermo_king_magnum_plus_203_parts_list.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/kifatojegasav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_600fd70f5dafa.pdfIn PDF document text
    • https://vororesefuvemux.weebly.com/uploads/1/3/0/8/130813496/7129055.pdfIn PDF document text
    • https://bolefusugo.weebly.com/uploads/1/3/4/8/134868203/xijegabadejem-suvidip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368955/normal_6007a3a91347e.pdfIn PDF document text
    • https://wevumofanefaso.weebly.com/uploads/1/3/5/9/135964816/kakexibisusolamus.pdfIn PDF document text
    • https://wudatoguji.weebly.com/uploads/1/3/4/8/134885495/7aaf820cd95c563.pdfIn PDF document text
    • http://nanutoz.22web.org/mojakojofiremo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5fff336a347d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gebibem.epizy.com/60824266994.pdfIn PDF document text
    • http://lexupanerosexa.epizy.com/91656871076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208d0b06-25d3-4039-82eb-02619cd561c5/how_to_use_fire_tv_recast.pdfIn PDF document text
    • http://xokopaxitake.rf.gd/87836391611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec5f18c-9d5c-48fd-9928-aa746a49db3f/1655891337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f83a5a0-e6f5-4212-9bf5-20e3ebb97211/what_can_i_eat_on_a_cleanse_day.pdfIn PDF document text
    • http://zomimuju.rf.gd/nojujakip.pdfIn PDF document text
    • http://mulagokonud.rf.gd/reliability_test_in_spss.pdfIn PDF document text
    • http://rawozenagi.epizy.com/96584018870.pdfIn PDF document text
    • http://fegidil.rf.gd/chauvet_stage_designer_50_factory_reset.pdfIn PDF document text
    • http://xesesezaxemu.epizy.com/22774401907.pdfIn PDF document text
    • http://xikisefux.epizy.com/cubes_and_cube_roots_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e670235-9d4f-4fa6-948a-26449c75aadf/96104330143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c78175f-4ac8-4393-bc51-bd4f864921c3/laminiv.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_off00010acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACC 5112 bytes
SHA-256: 798c3f4045573ae2cb4996ab49addf824729aeb2e08670fbd1ea998e5e822800
font_01_sfnt_off00011c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C12 10724 bytes
SHA-256: 104a59d97cb359e5f35fb8ac815faa8153ef446e99c977714d723ac422227d10

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