Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aaedfecb4328a10…

MALICIOUS

PDF

82.1 KB Created: 2021-01-31 13:22:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a5642c923685423017a17e137f6ab59f SHA-1: 82a59a3957346acb0da75c98c8e2b15439248e5d SHA-256: 2aaedfecb4328a104c6919237ae11b86560773ab173127a99775ccae52155d62
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/123?utm_term=at%2526t+phone+answering+machine+manual PDF link annotation
    • https://sixalusizefew.weebly.com/uploads/1/3/1/3/131378898/tewebiki.pdfIn PDF document text
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/45d42fa2334a771.pdfIn PDF document text
    • https://cdn.sqhk.co/ruperodu/qiig1eL/cute_love_drawings_for_boyfriend.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/razow.pdfIn PDF document text
    • http://temezisabekazev.iblogger.org/16097701957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369514/normal_5fe3ab3b52c0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5ffddc9d2ee09.pdfIn PDF document text
    • https://cdn.sqhk.co/duputokodoz/gjVhiWm/geometry_dash_lite_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rebiguta/JjeXcii/65026124854.pdfIn PDF document text
    • http://bapipakaroxi.22web.org/spellbound_korean_movie_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463266/normal_5fcb9e3a1f135.pdfIn PDF document text
    • http://wexixexebasober.22web.org/adobe_photoshop_cc_2015_camera_raw.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/hejhhb4/cosmopolitan_las_vegas_hotel_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/nipumusawobo/geshfij/bazosasinujimamitofe.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/hfjiZFQ/43904257166.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/fhiibji/mokonusagupupotibifamozer.pdfIn PDF document text
    • https://cdn.sqhk.co/pibigovaxavu/cULgdhf/elements_definition_literature.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392658/normal_5febc3e41fa1f.pdfIn PDF document text
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/2f0d673.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/YBiqPhj/defender_car_for_sale_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zomimuju.rf.gd/identity_card_template_free.pdfIn PDF document text
    • http://lojetewope.epizy.com/rejubetelerepoguj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FB 4144 bytes
SHA-256: fc02dd8945052924da689f24daa8249a6b0a5d6ddc2ca787317cb0ae9dcccdfd
font_01_sfnt_off0000f515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF515 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000fda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 11692 bytes
SHA-256: fa47e674ee3041817f5b84cef79fc5c9bf2aafcb3b7e3ff539e56f9ed733d02f
font_03_sfnt_off000124d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D9 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939