Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40027d7bb5629ae…

MALICIOUS

PDF

45.2 KB Created: 2020-11-09 08:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: ff6c9e4509cbffb130069da074d10265 SHA-1: 8b7da155a7531f0c1d31a3cb998eea0573bc9530 SHA-256: a40027d7bb5629ae01f8578d9405907ee2ea0d175ce7d2515387d09f926493fc
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://traffine.ru/aws?keyword=song+dude+looks+like+a+lady+aerosmith In PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/zaxopamumini.pdfIn PDF document text
    • https://fixelomutitag.weebly.com/uploads/1/3/4/3/134339240/fukeniga_dofoxa_sidolutupola_kixojizir.pdfIn PDF document text
    • https://lewejasolon.weebly.com/uploads/1/3/1/4/131437246/dobadowimolivab-xopewekod-remugaw-jizerebagiki.pdfIn PDF document text
    • https://gunulavosaki.weebly.com/uploads/1/3/4/3/134374607/9bb585c7e1.pdfIn PDF document text
    • https://dobekaveliwe.weebly.com/uploads/1/3/4/5/134599348/lodoteg-savinijedugawut.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/c8daa7ae.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/dekapiragadugilita.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/6567b724e27e0.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
    • https://uploads.strikinglycdn.com/files/83ff51f5-6edb-4de6-b51a-c7e3160ee815/contrabassoon_fingering_chart.pdfIn PDF document text
    • https://bixirofu.files.wordpress.com/2020/11/abs_and_chest_workout_at_home.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.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_off000060df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DF 5388 bytes
SHA-256: 0fa0b6eddd6d8a0eb7f4d91eddec4a76353ed7e752c1209203d9b7d6c2478564
font_01_sfnt_off000072ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FF 12400 bytes
SHA-256: 0d853eb5df0d344d8b0557429c3142027bf05f8993c286212d0cc5f2c81c09cb
font_02_sfnt_off00009a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A64 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e