Malicious PDF — malware analysis report

Static analysis result for SHA-256 594870e701a1fe2b…

MALICIOUS

PDF

81.5 KB Created: 2021-03-16 08:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 591a741cafa719a14e91ccc43375556e SHA-1: bc6d6846711f692d63f6b7ea569802e62682111c SHA-256: 594870e701a1fe2b93b4d7fc556a13d2e90e3e0d1bc5c37f3e52ee67ad34b29e
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 it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/123?utm_term=casanova+movie+songs+free PDF link annotation
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/e425ce25ff256f.pdfIn PDF document text
    • https://fefokivaz.weebly.com/uploads/1/3/0/7/130776727/giwuxenodikogis-mijokubaxol.pdfIn PDF document text
    • https://kivutafiderok.weebly.com/uploads/1/3/4/5/134598466/lakudakaper-nabub.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/jibw3DN/playgo_gourmet_kitchen_appliances_sam_s_club.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_60150048a9186.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hiiiggc/emperor_and_beauties_gift_code_2020.pdfIn PDF document text
    • https://romenazojojeles.weebly.com/uploads/1/3/0/7/130775884/55073e872.pdfIn PDF document text
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/bezuwasozidibop_giwagejabag.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/PJijgfb/virtual_family_games_free.pdfIn PDF document text
    • http://kuzososo.mygamesonline.org/63692937808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_603235f9238d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450896/normal_5ff21e51ee6be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_60348d8a43aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_603e1c17ab69c.pdfIn PDF document text
    • https://gekubunog.weebly.com/uploads/1/3/4/2/134235395/besobezajan-pirisofet.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://wolobugoxew.myartsonline.com/how_to_play_dd_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2e9126-4bfd-4e30-ad1e-9ff2c6e0f638/nemenuxexazikenuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2844b9d-d675-4b74-91c7-dd926d8bfa22/31164684788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4085a1ce-20d2-4725-b488-d482183a3661/how_do_you_start_a_private_investigation_business.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_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 4848 bytes
SHA-256: c1a1b8d28e36d382b340e6379d7094bc7cf7fa8a3b393be8315bfe7e75accef1
font_01_sfnt_off000103d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D9 11512 bytes
SHA-256: 5a31083d09e2f045ceed28312199d07515c4f982be7dc864f7acfc6f61542df0
font_02_sfnt_off00012acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2