Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed197497e3e098d…

MALICIOUS

PDF

77.9 KB Created: 2021-05-06 11:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ffaeeed7db1358db749526d6d44ecc78 SHA-1: b2549260ebaf48311fde7ce3bc534a0a67def4f7 SHA-256: 7ed197497e3e098d5379507c8f91983c3bce90e24f46b8f3059ea323c818aa51
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it's part of a link farm designed to redirect users to potentially harmful websites, such as the one at `jottigo.ru`. The document's content, though heavily obfuscated, appears to be a lure, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/strik?utm_term=feeling+words+chart PDF link annotation
    • https://cdn.sqhk.co/josedinis/zgmwKgj/56768271694.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • https://pafetinavip.weebly.com/uploads/1/3/4/8/134868030/wufuzur-fubabar.pdfIn PDF document text
    • https://cdn.sqhk.co/tisumusef/eh4gejb/guduz.pdfIn PDF document text
    • https://cdn.sqhk.co/fasazani/XhgjMhg/61725331292.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/qgdxgfV/goviwekiwetesazunoxurax.pdfIn PDF document text
    • https://foreguguwikib.weebly.com/uploads/1/3/0/7/130775698/d5dadb.pdfIn PDF document text
    • https://tavazefemaxi.weebly.com/uploads/1/3/5/9/135966092/870766.pdfIn PDF document text
    • https://bixuduserar.weebly.com/uploads/1/3/4/8/134861961/9056692.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/xjeCOPm/ginofawurumetomurasubego.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/ZA3ibgj/bubejatu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_d1a410a55b994eca8259217a72fad2d1.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_992a8f1b2a3243bc8bec172c9005760c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/055332fb-e6ee-45c3-8100-4df964112751/for_beginners_how_to_draw_girl_anime_manga_face.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_9f9a257be8cd44d7a14e10b142718e1c.pdf?index=trueIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_b0882e6a121d45fdb453ae40e947a6dd.pdf?index=trueIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_783fbc27a7064de2a33d7b8b2d61892f.pdf?index=trueIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_73620a38113342f9a5a397c3446d9c59.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3173212d-aa84-4bb6-83a4-5034c4f6dfcb/98583326482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2928bd2-aeed-420b-bb90-0e31965f35f3/bissell_little_green_proheat_portable_steam_cleaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c646f76-04de-4c71-9a52-d0cf1dfb80ef/what_is_composition_in_photography_definition.pdfIn PDF document text
    • https://4900ecec-7ac1-411c-be2c-b077674085c8.filesusr.com/ugd/493135_de8ae28040874aed980e6e3d84577f90.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2cbd192-c6b3-4fb9-a844-c0df10808bf9/gosomirawilil.pdfIn PDF document text
    • https://dfde94ff-8c6c-411d-9c04-f18b57906ec7.filesusr.com/ugd/47ec90_063e623bca214acdba7b06b0e2231047.pdf?index=trueIn PDF document text
    • https://469ee322-798e-4c1d-9571-af6764901f97.filesusr.com/ugd/57169b_e60bbff5677b4d5ebd2673d544824fe9.pdf?index=trueIn 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_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 5248 bytes
SHA-256: ec95bde23f2f565ededefd5047158dc7b9a8b3c753ea312b54afc771bda2c1ed
font_01_sfnt_off0001065f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 10456 bytes
SHA-256: 99edbb5278c0b6e9b184d57bd8f130b500f14d76ab9b97b33e1f48d87ffc776f

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