Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bcb305201cb898…

MALICIOUS

PDF

74.6 KB Created: 2021-01-31 00:22:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b415efe47f6ccf83f26ffbf346141282 SHA-1: f17d99d451079a7c359b945d3ea6d88802730d3d SHA-256: 62bcb305201cb898accff5fca2dcc4203795f3e5707eee8a1572f28178055c83
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured with UTM parameters, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically highlights the use of disposable hosting and link farms, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/123?utm_term=high+rise+jg+ballard+pdf+download PDF link annotation
    • https://cdn.sqhk.co/sufadoma/jcqmher/mirrors_justin_timberlake_lyrics_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/nefijisob/dibgfU2/84299825317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494677/normal_6003c23c4113d.pdfIn PDF document text
    • http://alex-travel.moscow/zixedinowixisebixunu11otp.pdfIn PDF document text
    • http://changepass.online/46384925193vlax3.pdfIn PDF document text
    • http://prostochillforum.fun/certified_ethical_hacker_guidec88fl.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/igygghd/38774078317.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/GZ5ghvi/28499229043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373008/normal_5fe49e373e173.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/ieVidjd/nyc_bus_subway_live_camera.pdfIn PDF document text
    • http://milanomoda-italy.website/free_rock_ringtones_for_mobileot2l8.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/hgdgdZL/chocolate_mousse_pie_recipe_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/8gGhhjf/vr_theatre_video_player_vive.pdfIn PDF document text
    • http://chemistryplus.space/download_sea_battle_warship_mod_apkg2m7y.pdfIn PDF document text
    • http://livethailand.fun/cat_room_cute_cat_gamesd7p7i.pdfIn PDF document text
    • https://cdn.sqhk.co/gurudulep/Zjchggc/gun_gang_apk_download.pdfIn PDF document text
    • http://widevuvi.22web.org/agneepath_full_movie_480p.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/giJCBSK/plague_inc._evolved_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/hagjdif/dream11_ludo_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_5fd3c0ae5b9c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424025/normal_5ff861703a716.pdfIn PDF document text
    • http://jnatural.space/63017210113npanl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxaguwen.epizy.com/kelewosisewajusu.pdfIn PDF document text
    • http://mirepili.epizy.com/21429813244.pdfIn PDF document text
    • http://wabelat.epizy.com/somosugeroletagokasuwara.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_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 5572 bytes
SHA-256: 100daada5dbe4559335ff263d3b265f8b8dcc555b5c3eb628a92392ef3bff284
font_01_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 10272 bytes
SHA-256: ee1eba43c6fa7f3882e80f58fd020c112ae69265f8c58bb00b50ba878d00a10a

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