Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efb8583e962b2ec…

MALICIOUS

PDF

86.9 KB Created: 2021-05-01 03:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3b0a48dcf034a38e611a0df0633552cc SHA-1: 2f164e1e83e59eac88dd65bdd6170b05d601f999 SHA-256: 9efb8583e962b2ecac2e1f79983fc2c4815b73036786fabee7e503ad72106cd2
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://zajinet.ru/strik?utm_term=how+to+read+tarot+for+beginners PDF link annotation
    • http://kubikox.iblogger.org/54225999781.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/hcjbjeR/66180720948.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/Lgihdhi/ryan_toysreview_roblox_story_games.pdfIn PDF document text
    • http://filanion.online/dungeon_master_screen_5e_espaoldri9t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384484/normal_5fccbf2c1c848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491173/normal_5fc5757d3ebda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409396/normal_6002ff38e20d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_6068f76acd15d.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/kububifoweg.pdfIn PDF document text
    • http://ketotreno.buzz/homelite_3514c_chainsaw_wont_start1j4q8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425238/normal_600335c7376ee.pdfIn PDF document text
    • https://kozamewibigox.weebly.com/uploads/1/3/0/8/130874388/1d28b6769.pdfIn PDF document text
    • http://fojowufuzuno.22web.org/how_to_white_tigers_protect_themselves.pdfIn PDF document text
    • http://trycabinets.xyz/vowutugm8xb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_29a67ba185894112ab19f62aa826f959.pdf?index=trueIn PDF document text
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_f4f14a6b81214cbc9cae963548622cd5.pdf?index=trueIn PDF document text
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_2c49965be437495ab1fdd0c430971b41.pdf?index=trueIn PDF document text
    • https://8a83ad47-1dc6-4e38-b726-138de0fe4a7e.filesusr.com/ugd/043c68_86b83ee8eac2447c9f8e5bcd9e45ef75.pdf?index=trueIn PDF document text
    • http://nonosolagosev.epizy.com/53198358381.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_ba829209cbad425ead1c5ca738cbf665.pdf?index=trueIn PDF document text
    • http://gotojin.rf.gd/ateroma_en_equinos.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_off00011683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11683 5236 bytes
SHA-256: fb223da808eb4c92ebee123ed70d0ca406fac5a01bac9ffff098cc430fab7427
font_01_sfnt_off00012871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12871 11220 bytes
SHA-256: 76d0a169dd43fae08892dae6b61b766bc75bc97e03ee80e7be049f5d10436092

Open this report in the interactive analyzer, or submit your own file for analysis.