Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d8217771559e6e…

MALICIOUS

PDF

38.4 KB Created: 2020-11-08 18:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4f9cd007719e88df5f9579c9983d9491 SHA-1: 77ce0d862c392069c4c3c77dfea15caa81f99313 SHA-256: 73d8217771559e6eb80b2a62d3a629c7ca6766731c422c6cac0bec0795b3ed88
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://traffmen.ru/aws?keyword=florida+drivers+manual+audio In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384039/normal_5f92021c5e859.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/c13d287a47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f9276324392a.pdfIn PDF document text
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/kowesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gijalexipo.files.wordpress.com/2020/11/41759463985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef15ccc2-3054-4d69-b1aa-c2bb1868f03c/56574870766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90db2fbb-4982-4167-a0a6-caa5049be07c/limadubiwijixa.pdfIn PDF document text
    • https://todovot.files.wordpress.com/2020/11/93417973113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d853a90-ec6e-4387-bd63-cc91ab4aab6c/bamatafofitovutewit.pdfIn PDF document text
    • https://xukurupaja.files.wordpress.com/2020/11/pathfinder_giantslayer.pdfIn PDF document text
    • https://lifabetedo.files.wordpress.com/2020/11/julkakor_till_salu_online.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.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_off000057ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57ED 4984 bytes
SHA-256: 8fb2f6448f208e4bf71736d7e6acf506551623881c1b27aa8653297d6ef137bb
font_01_sfnt_off000068cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CD 10712 bytes
SHA-256: 5a4cd9328c7c535c510981ba853057459f065f5ce25a548aaeccf68fedf0529a