Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9712192b1aa657…

MALICIOUS

PDF

129.1 KB Created: 2021-03-16 03:28:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 703432c187aef9fbc8259551d9186010 SHA-1: 9fca19fbf9b953b297d29b7f230f91fb7f20f29a SHA-256: 6d9712192b1aa65739f7c13ef6ca4d24353615132806f53e3a4abed7dfcfb85b
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 0.9998

Heuristics 6

  • 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 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://crophysi.ru/123?utm_term=lululemon+size+8+guide PDF link annotation
    • https://cdn.sqhk.co/raxedaninaso/iciiScC/49641307783.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370062/normal_5ff933b3addb2.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/gicvhda/77586399856.pdfIn PDF document text
    • http://e-devletodeme.net/miwuratedl5kkc.pdfIn PDF document text
    • http://naturfresh.space/weber_spirit_eo-210_2_burner_gas_bbq._blackgr29g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5ffcbfac7f90b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_6039bb43a0132.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/hieF036/laligepit.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/wo5ijJJ/grow_credit_reviews.pdfIn PDF document text
    • http://remontnatali.ru/pixidolipaveveror5pk5.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/djer6qJ/android_one_motorola_moto_x4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_f9b4037a930047428bdc233e9aaf0acc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4c1905-ab9c-4a0a-87e1-45af23e1b536/master_and_commander_the_far_side_of_the_world_full_movie_in_hindi_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff5e6aa-7d77-4b20-ae90-a8fed2a34e76/golds_gym_480_treadmill_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeee433b-db5a-44ca-9385-ee8f4c1e12a4/74210397095.pdfIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_5ae82a1ca9984af780848922ecd54f01.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_a73a61bce5214026bdb6aca4b6b40cfa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd862ec-0961-4f76-afd2-1e84b406dca2/tadatadejufa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 61468 bytes
SHA-256: c53d8c5defffc3313ce1654eb35446de4a62e9f88a0adecfee4026866b65d41d
font_01_sfnt_off0001bc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC30 5024 bytes
SHA-256: bf89ecef08765e76d0b629ea6cd155110af71aec9caaa4e036adb9219ba70a01
font_02_sfnt_off0001cd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD45 12376 bytes
SHA-256: 9c267cb78a3ed53feeee1f01f9347a22bc4eac5f90ad3dbe58a24618a4274e07

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