Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30ae45958b6b850…

MALICIOUS

PDF

80.9 KB Created: 2021-05-07 08:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c282f059cf76db63084cc520e5ba2555 SHA-1: 846480123e1dec7fc26dce4689d14e19c14592b4 SHA-256: b30ae45958b6b8504dbe54a69ea56eaa53046633b7d49242c079c9afc8b34def
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning attempt. The embedded content appears to be a search query related to Wi-Fi issues, likely intended to lure unsuspecting users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=why+isn%2527t+my+wifi+working+on+my+samsung+tv PDF link annotation
    • https://dajexave.weebly.com/uploads/1/3/4/3/134352807/zomazazu_tukudaxagaxi_damijofa.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/giVjbe2/topography_of_terror_guided_tour.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/wIgdnb5/wwe_mayhem_app_cheats.pdfIn PDF document text
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/fidajojafunomag.pdfIn PDF document text
    • http://jikusoxet.iblogger.org/cards_against_humanity_appropriate_age.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/sjcNfgg/new_english_songs_listen.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/jdhaVii/vogefenebufowesetufuxo.pdfIn PDF document text
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/91f724.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/6b3ff7406.pdfIn PDF document text
    • https://tiriwubesunadew.weebly.com/uploads/1/3/0/7/130739346/baxileg.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/giejhjh/gaminator_casino_slots_free_slot_machines_777.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/febufuladon.pdfIn PDF document text
    • https://zomoxiwoginu.weebly.com/uploads/1/3/1/6/131637743/6504582.pdfIn PDF document text
    • http://gigurokubi.66ghz.com/19284654677.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
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_dd2c215934ab4856b9351c1c7038e924.pdf?index=trueIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_b9888abe71874ba6a78af7a26e5db1fb.pdf?index=trueIn PDF document text
    • http://janodabo.epizy.com/32883011992.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/aes_cbc_pkcs5padding_android_example.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/the_last_leaf_o_henry_plot.pdfIn PDF document text
    • http://lipewolitaden.epizy.com/acer_aspire_e15_battery_calibration.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/68655667387.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_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 5280 bytes
SHA-256: 097fb2bd26270fac60ca4c0c75c8ae8ad1e1753b45d7c8ade4d8eba4916e9223
font_01_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 10924 bytes
SHA-256: 36864359f84f3bbe6f091cba55390944f5af294e973c23a5d4e7edff2650a142
font_02_sfnt_off000127ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2