Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ff114c6a66baa0…

MALICIOUS

PDF

72.8 KB Created: 2021-03-05 09:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0da6d618fb64e0398c3b5a0423dbc3fa SHA-1: 52e3e2b1cfa0da1a730c163d45ab228e60d41285 SHA-256: 62ff114c6a66baa0e0c23849515f26337020600281fb100c9605370b77405795
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a document body that mimics a search result for a book, directing users to a suspicious domain. Heuristics indicate this PDF is part of a link farm designed for disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious, likely a phishing or trojan delivery mechanism. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document body leading to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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=donde+comprar+el+libro+del+coran+en+espa%25C3%25B1ol PDF link annotation
    • https://sadebisoj.weebly.com/uploads/1/3/2/3/132302749/4909571.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/d83BidP/wufipalifenuwosed.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/ejdCJQd/16750819708.pdfIn PDF document text
    • https://buruwezixefekiw.weebly.com/uploads/1/3/0/7/130738548/biwipumabunisod-wiruka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5fceea91e460d.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/jcajbic/21197550248.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/3453129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5fd80a3b3b334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481699/normal_5ff169dc818ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_6032cc8462905.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dapodakek.rf.gd/sheikh_akbar_ibn_e_arabi_books_in_urdu_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bc903a-885f-4e9c-a5b1-f1869b6dcf9f/how_much_is_a_nickel_slot_machine_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/dedonibudizen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9cc6015-dfd6-44d0-a38c-0e88056ca8c8/13240939760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35330ce7-4afa-4bed-a6bf-ee0f2972c276/lewozuwulexavizoso.pdfIn PDF document text
    • http://lekamidoku.epizy.com/kapodo.pdfIn PDF document text
    • http://fetapewifug.epizy.com/citra_android_pokemon_y.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/play_tamil_new_songs.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_off0000cde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE7 5276 bytes
SHA-256: bbd2fc6be55d3a9ddfcbb772ad2b411754285f57226f5aab41dcd68358d90318
font_01_sfnt_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 11700 bytes
SHA-256: d4a612bb6967cf2393d6d5c9f7307be649afeca7389624c5f39a776beb4ce541
font_02_sfnt_off0001056a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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