Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f625f8dd21edc8…

MALICIOUS

PDF

99.8 KB Created: 2021-05-10 08:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bb7b198f33316740d5a3f604274aacc9 SHA-1: 86f75ab80416c5c408d24595d15359b1685c5b17 SHA-256: b0f625f8dd21edc8652f2c979915f73264a5bc0fa985da65726d5a77c5bbfa9b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious site for further exploitation. No scripts were extracted, but the presence of many external links and the overall structure point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://golowaki.ru/strik?utm_term=what+is+programming+language+and+its+types PDF link annotation
    • http://rivafigikiwax.medianewsonline.com/1518024524.pdfIn PDF document text
    • https://jumolemema.weebly.com/uploads/1/3/4/8/134853288/fimodogoji_magowuve_tepilas_tipatubis.pdfIn PDF document text
    • https://sepiboberad.weebly.com/uploads/1/3/1/1/131164555/tunelamusi.pdfIn PDF document text
    • https://cdn.sqhk.co/negapevu/cRjfhjQ/nudonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_6040f4f65dd16.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/LiejfoI/siberian_tiger_habitat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fcddf07acf13.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/jojowuxewaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444366/normal_604ee6358fa01.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/jhfHWje/90244663261.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/how_to_read_nutrition_labels_canada.pdfIn PDF document text
    • http://jigikujed.scienceontheweb.net/ap_stylebook_online.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/70914060958.pdfIn PDF document text
    • http://zitarekatinupas.sportsontheweb.net/25597856387.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/hhghieL/little_big_snake_free_download_for_pc.pdfIn PDF document text
    • http://berozabekep.sportsontheweb.net/57778896695.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://widifusi.myartsonline.com/ziwenopisizovud.pdfIn PDF document text
    • http://widifusi.myartsonline.com/13359726993.pdfIn PDF document text
    • http://ruvemad.myartsonline.com/bacteriological_analytical_manual_bam.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/trumpet_chamber_music.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/pdf_to_word_converter_offline_free_download_filehippo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11371 4016 bytes
SHA-256: f7544b7057002509627d79a0531fb86ca0cd48fffeb7f7b8d35770204cce26ee
font_01_sfnt_off0001219c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219C 5368 bytes
SHA-256: 1e6e2cb55ea1cae3c1f1bfad4febb4d037c698ce7e03f8c0cd79bb3166d8a75c
font_02_sfnt_off000133c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C6 11752 bytes
SHA-256: c9f9a671953b8862907449db44256fd6055beb11879f7cceca8169248fbb44b8
font_03_sfnt_off00015bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BF6 16164 bytes
SHA-256: 3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58
font_04_sfnt_off000170ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170EF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f