Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9adc55a758aeb6…

MALICIOUS

PDF

117.5 KB Created: 2021-03-19 06:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2d4a094eb9a2e76ba1cba8f1af0e7f11 SHA-1: 123bf2e1c4a5d317af8f523479d29d86eea1e0d2 SHA-256: 7c9adc55a758aeb6e0d27896f543de529eb2e2154315fd590a94e05d8259ea4d
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The primary URL, 'https://xezojetit.ru/strik?utm_term=what+is+extradition+in+public+international+law', indicates a lure related to legal topics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/strik?utm_term=what+is+extradition+in+public+international+law PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480174/normal_5fe8325484fda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501645/normal_60055b63cba66.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/kzIgcjc/bazosibuwusupasepaxo.pdfIn PDF document text
    • https://gapidegit.weebly.com/uploads/1/3/1/3/131379699/deporosawiro.pdfIn PDF document text
    • https://cdn.sqhk.co/xatuxazaz/cyGhhv6/83372736808.pdfIn PDF document text
    • https://cdn.sqhk.co/zovigobut/8giDnJh/fivufisaxodav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403119/normal_6037ad7b3c344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fe64cb96c388.pdfIn PDF document text
    • https://gezeteweni.weebly.com/uploads/1/3/4/0/134040803/sewoxoxof.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/ijbgjHz/69185325052.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarimeg/6ggARii/roblox_obby_time_to_jump.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzutuse/Z2gijeb/magic_rampage_capitulo_2_nivel_6.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/jdkjejj/senukobemosexa.pdfIn PDF document text
    • https://jifigisij.weebly.com/uploads/1/3/2/8/132814194/safodiwuvu-pusigefevusudi-rewijaj.pdfIn PDF document text
    • https://fefaxunitu.weebly.com/uploads/1/3/4/3/134399706/eb763e8e57ea3.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/cervicitis_cronica_tratamiento.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuguxovim/Wr0DhhB/airplane_mode_song_1_hour.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/iidT3jB/lovesofazitupafovaz.pdfIn PDF document text
    • https://kazanuwe.weebly.com/uploads/1/3/2/6/132683097/zutana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e4c584-a21c-46a5-933f-5a1baa1d05c2/shivprasad_koirala_7th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dfff4d4-2e92-4bac-8a51-012c816bbc92/vofoxudipigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe49f245-ca35-4d72-8616-45783db30b52/1st_20_cube_numbers.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/mixefamirimaxepedene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ecad79-7981-44bd-aefb-c2746ae4c6a7/29217846210.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_off000161ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161EE 11468 bytes
SHA-256: 82851470e912d9933c139ec0631b57567b41010b174d4de8b9dd59bae98e34db
font_01_sfnt_off00018742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18742 5472 bytes
SHA-256: 142cbd1262f7719b19c013623d6e746376b63953a762e4d6f3e88475dc08cf22
font_02_sfnt_off000199ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199ED 16240 bytes
SHA-256: 671a10addaa393c710611d9b4405601517752e7bc021eaad199acad885026fb1