Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f3096bc61434c6…

MALICIOUS

PDF

81.4 KB Created: 2021-06-01 10:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0985a0e6470104e817de69a073d4f79a SHA-1: 55a27e0ab238da17876a8db184c974ba6a72fbbd SHA-256: 69f3096bc61434c6b722f0697ea0c9b658cfaa5625efc260fafd8ccdf5471108
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The primary malicious URL identified is https://jottigo.ru/123?utm_term=fugue+state+vulfpeck+sheet+music.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/123?utm_term=fugue+state+vulfpeck+sheet+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496146/normal_5fecf494529e7.pdfIn PDF document text
    • https://defireser.weebly.com/uploads/1/3/4/3/134347292/89c5e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_600c82f1c03bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460058/normal_6049998b97cf7.pdfIn PDF document text
    • https://temuvizot.weebly.com/uploads/1/3/4/8/134856639/9462158.pdfIn PDF document text
    • https://pufotesur.weebly.com/uploads/1/3/1/3/131378771/7b737c2455fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496216/normal_600413f065214.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojifot.pbworks.com/f/can_you_lose_money_in_the_tsp_g_fund.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed1a96fc-f2c8-4cf1-ab17-b568695f1859/13248186080.pdfIn PDF document text
    • http://naxoxututal.pbworks.com/w/file/fetch/144444447/lg_g_pad_x_8.0_screen_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2554a2c8-5dbf-439d-94c6-ef8f97282a31/26898782218.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/f/grille_salaire_secrtaire_mdicale_2020_fonction_publique_hospitalire.pdfIn PDF document text
    • http://sajateves.pbworks.com/f/download_game_ppsspp_dynasty_warrior_6_iso_ukuran_kecil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958b1d47-131a-4491-bc11-74f9cf9ce3de/31435553445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63772ca1-9f61-4f72-9bd1-4230b17c4489/95784704218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3133fe9-072c-44c0-b426-031176243d83/riganozisoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193d0a38-d7fd-4da0-85f1-99ac2ae2ed35/physics_class_9_ncert_solutions_chapter_11.pdfIn PDF document text
    • http://naxoxututal.pbworks.com/w/file/fetch/144444438/mahaprabhu_sri_chaitanya_colors_bangla_serial_song_download.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/wagunibi.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_off0000fe88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 5412 bytes
SHA-256: eb73bcb94eb9ffb7aeef796019bfc4b0d9e400a2f8fb4beb1d76753ed27d1232
font_01_sfnt_off000110ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EC 11672 bytes
SHA-256: 3b3c1995c44b91aa6292e1678e210b30cbbacf20774950586f2d06a64a06444d

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