Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15748ce58340554…

MALICIOUS

PDF

40.6 KB Created: 2020-11-07 05:02:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: c668071d44815e1508ec514d8473640d SHA-1: 0c00254f17f017c3fa46140fa2c597e43b733d67 SHA-256: a15748ce58340554f08cca8045fb6ce4ede0de7659576b09b99190fd9660b999
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/aws?keyword=zeiss+contax+iia%252Fiiia PDF link annotation
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/1359114.pdfIn PDF document text
    • https://lepuzabokagat.weebly.com/uploads/1/3/4/3/134333079/zebuzikofik.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/najumabapijitom.pdfIn PDF document text
    • https://nukawidizuzaxep.weebly.com/uploads/1/3/3/9/133997642/xesawag.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/235040fbfb8f.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/0951ee38-171a-45dc-8586-224423a21538/jobowugem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf79434-c27f-4fa4-9d9b-468109795bc5/bizenu.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/40k_codex_8th_edition.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/gopiv.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/52811065271.pdfIn PDF document text
    • https://gupebizew.files.wordpress.com/2020/11/ballad_of_birmingham_poem.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_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 4724 bytes
SHA-256: cf59734a9b20b72ba3c8fe130049da49f0df0603292bfa2a4a3d62791d911c6d
font_01_sfnt_off000073b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B9 10028 bytes
SHA-256: f789007dbd93fe43b06e15dec13831357f04000a049afe4d6027dc5ff0cddd26