Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c500639e4bdfe8…

MALICIOUS

PDF

73.4 KB Created: 2021-05-04 00:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d77b5cdefa8d3882de438130ec34a696 SHA-1: e8f8e7231781871ff701e0d873b892581f7f35fd SHA-256: 48c500639e4bdfe8899468fec1c48bc61a62e89de28310f05222192450de61a2
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, including one pointing to 'ponafet.ru', suggesting it's designed to redirect users to malicious websites. The document body, though heavily obfuscated, contains keywords related to network device setup, likely a lure to encourage clicks on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ponafet.ru/strik?utm_term=netgear+n600+c3700+setup PDF link annotation
    • https://cdn.sqhk.co/jaxabofapuw/hagjdif/dream11_ludo_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/dhcjieS/entity_a_horror_escape.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/SHvuLwL/dexejudinelutenipufizu.pdfIn PDF document text
    • https://petovowatudero.weebly.com/uploads/1/3/1/6/131606592/4420770.pdfIn PDF document text
    • http://freshka.fun/female_wolf_costume_ideask40xr.pdfIn PDF document text
    • https://somubafe.weebly.com/uploads/1/3/4/4/134444697/rexadodetoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_602e125919fa1.pdfIn PDF document text
    • http://teksol.xyz/zagg_rugged_book_not_charginghrmmm.pdfIn PDF document text
    • https://matiposokatogu.weebly.com/uploads/1/3/0/7/130739068/4bd3b1.pdfIn PDF document text
    • https://cdn.sqhk.co/semoxumid/ibFpicM/lojexitavugadunotigebiz.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/b8d3bdc.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/jfgcv5J/gediti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_5fe89cbcf1043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446035/normal_60067fcde449d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5ff0385064736.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/kesiwudumukolozo.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/tixedujegibex/62635062554.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/blackpink_album_square_up.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/tepavumuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b457a256-3936-4e5d-9f3c-9cc252d5531d/ng_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e42f971-91f8-4f7e-abf1-8e76de0218af/26729858567.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/37784631759.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/30726394742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66210bd1-e5fc-416d-ae80-bf471a5c00ca/princeton_review_gre_register_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7ee87d-78e3-4c31-b36f-f32c514db25f/how_to_use_grill_in_haier_microwave_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/620a6ea0-db18-4881-bb12-360e424ead0d/30210280168.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01A 5580 bytes
SHA-256: 90aeb89803bb9ea0e0b84009621580f187271b699b5a12120c23b4cdcc2c0d6d
font_01_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 10764 bytes
SHA-256: a7dd2c9e48477cff24ec354a62c1c87f58e6e76274a9025a36c6800a06f8b274