Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a12c1b9cbd29864…

MALICIOUS

PDF

44.7 KB Created: 2020-10-16 04:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 89cca679891ea608de5c51afa929e745 SHA-1: d0ae336321cf5637fd0a62d3829cbbf9ee470d93 SHA-256: 8a12c1b9cbd298647d416868ca8897b2842e9c34a74044e7b30db3afd2f7b94b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?keyword=cable+glanding+and+termination+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f874337688b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f8816110f91f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_5f88d262bfce1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f88da9022e89.pdfIn PDF document text
    • https://site-1043975.mozfiles.com/files/1043975/62314451302.pdfIn PDF document text
    • https://site-1038982.mozfiles.com/files/1038982/94193576887.pdfIn PDF document text
    • https://site-1044067.mozfiles.com/files/1044067/lizagunavuz.pdfIn PDF document text
    • https://site-1042869.mozfiles.com/files/1042869/8906074979.pdfIn PDF document text
    • https://site-1040513.mozfiles.com/files/1040513/futukovidasipopesi.pdfIn PDF document text
    • https://site-1040097.mozfiles.com/files/1040097/vigataxibimunuwijubax.pdfIn PDF document text
    • https://site-1038635.mozfiles.com/files/1038635/rukodusogakalisurade.pdfIn PDF document text
    • https://site-1040775.mozfiles.com/files/1040775/84148335734.pdfIn PDF document text
    • https://site-1040777.mozfiles.com/files/1040777/ridogivorebaririxadopewi.pdfIn PDF document text
    • https://site-1040794.mozfiles.com/files/1040794/587613239.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/uf_internal_medicine_clerkship.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8776/4895/files/pikajosusunajasasipejop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3631/2220/files/jifaxexapabuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/one_piece_treasure_cruise_hack_ios_no_jailbreak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1591/4151/files/41436655735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3464f176-39ea-4cfd-bbee-af7f53f18019/susunemukanusigur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0eee31-2da4-4469-8a1a-8973b6279b70/pazimorejufemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9dcb0a2-251a-4a90-a0db-a349e5364d16/dodiropupewipefugekesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a6ac71a-9310-4613-9c25-c3f91d7ce7a8/24621035540.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_off000070a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 5228 bytes
SHA-256: 339b59f5bb0c87c26617485bb4817553c7a6cbae969986d3e1b1eeab719f90d0
font_01_sfnt_off0000825b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825B 10168 bytes
SHA-256: 4bfbe1631d624ce822b1632207155faa17f30c2b2be767f4c253eed78b46b0d5