Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5e91c05f913637…

MALICIOUS

PDF

85.7 KB Created: 2021-03-15 16:33:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 544a8d2e6669e2b6ee2ea16260969c02 SHA-1: 6461c70cb2361c7a04844eeb3b58ee165cbd0cb3 SHA-256: 1f5e91c05f913637df6fcb32a0d6fcd65b0b1af30149bb85ea1d9b60cf27476e
186 Risk Score

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 0.9993

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://xezojetit.ru/wix?keyword=2016+xeno+bats+for+sale PDF link annotation
    • https://zanolidades.weebly.com/uploads/1/3/2/6/132695759/5113561.pdfIn PDF document text
    • https://ragusixiseditof.weebly.com/uploads/1/3/0/8/130814169/nitako.pdfIn PDF document text
    • https://cdn.sqhk.co/xikesurufa/cDrU2gr/remix_song_youtube_par.pdfIn PDF document text
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/9e15dee54ea0ae.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/iejbOoR/art_therapy_masters_programs_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/fexiseme/egjngi6/58460773352.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/aheB1jd/lulivupaxupepoguwaji.pdfIn PDF document text
    • https://befawiboper.weebly.com/uploads/1/3/5/3/135389238/pokozuvav_wojek_misofin_kijitubazuboxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/nafixamupokapepativ.pdfIn PDF document text
    • http://xifedesekelogu.epizy.com/fowadamigilofasukuje.pdfIn PDF document text
    • https://a8a57b57-a5e9-4b5c-b824-02731ce3a1bd.filesusr.com/ugd/cfa667_123e792f1d36457389214f5d24f5ba6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c630bf11-ef2a-4c51-890d-29552953beca/67755845537.pdfIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_caf68f53452d4dbdab3a64bfa6361ac7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/legend_of_zelda_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb18418-6306-4fb3-b5f6-4de61b6e9583/ryobi_bt3000_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/apartment_guide_charlotte_nc.pdfIn PDF document text
    • http://kodosalepixalan.epizy.com/64915679237.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/caballo_de_troya_2_masada_jj_benitez.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/59866701092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6a8a3e-539d-461f-b209-5e7a13a25061/hp_50g_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2172ce27-c7ad-4f48-aa8e-96fb788eb52f/48826085414.pdfIn PDF document text
    • http://luxafik.epizy.com/captive_prince_volume_2_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38e2f92-c77a-4529-8fff-cc860af8ec55/jasenilemo.pdfIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_9f88050bbf4149b5b2612ae39e482ad8.pdf?index=trueIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_fc4b20992b5046b7a2c23f30b46f879d.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_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 5356 bytes
SHA-256: e2ed67c9467829231cb571451c8eaac5927b4558f63e677e22a0497723306a6f
font_01_sfnt_off00011c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C78 13580 bytes
SHA-256: ba2d1d64cd9cc60dfeffaeb1dd46033fc430f0a8740ec8a02250c93bd9dc3da8