Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfbe0ad0acfb018…

MALICIOUS

PDF

79.0 KB Created: 2021-03-13 21:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d34080da24fe81289870ec4da9fa20dd SHA-1: 5e9175ed7e66bf39f36198f1c75df0441b3eed22 SHA-256: 7dfbe0ad0acfb0181491cdda0deabb8c90dfe017fef95f41b55c71fbc01df143
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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://lozipotod.ru/strik?utm_term=the+chronicles+of+narnia+the+silver+chair+2019+release+date PDF link annotation
    • http://woziwowariv.sportsontheweb.net/afinidad_electronica_unam.pdfIn PDF document text
    • http://fsbsiod.com/what_does_iron_curtain_mean_in_world_historygdjjh.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/fY8mXih/early_90s_pop_music_hits.pdfIn PDF document text
    • https://rijokurep.weebly.com/uploads/1/3/4/3/134377239/92724b594c685ea.pdfIn PDF document text
    • https://ludajajuxo.weebly.com/uploads/1/3/5/2/135293479/kexavum.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/0jgigmr/29820757348.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/hhY5gii/jiwidupewomap.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/50940264871.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/rugevureba.pdfIn PDF document text
    • http://ridunculus.com/metorifaxokagifuwadzmybs.pdfIn PDF document text
    • http://shoop-fk.ru/what_does_ralph_mean_in_the_biblejnila.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/robotic_arm_construction.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/44716501006.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/edyBAKN/photo_blur_tool_app.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/0164a06b-6bee-4698-a2e8-045494ca10ab/79108608855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9213afa4-1209-4b21-bac9-2e5975fc0e6e/how_to_turn_on_num_lock_on_logitech_keyboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa3bc531-f13a-4cb2-b131-ef167d42d027/fimeborijopelemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05aa878c-1b1d-4b7f-8b1f-c18c416bbcd8/24813434802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8c5f47-04a4-45a3-b09b-23c041e45250/what_order_should_i_read_the_maze_runner_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92271e9a-e1d7-42b1-8ae9-a6be9086673f/fawelonovodikuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6fbbb1-438b-4e5f-896c-3209be603272/53888878516.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_off0000f520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF520 5600 bytes
SHA-256: f090bb9302e9da9492b6a495d122049e5937afbcea2522854ce09e8b47f5515c
font_01_sfnt_off0001082c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082C 11176 bytes
SHA-256: 69b262df49c3034caf205b2bf03cbfe8dfb7c54161a7d1f740b49d3a4dd28a95

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