Malicious PDF — malware analysis report

Static analysis result for SHA-256 736dcc2b3598d88e…

MALICIOUS

PDF

34.8 KB Created: 2020-11-06 22:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6b6ab153bd5d40aa22ae09fd93baab2b SHA-1: 27a2a1a8fc313c95363f53f14b3256f7ccd9d339 SHA-256: 736dcc2b3598d88ecbb516b46435143472b748adc3b167a89ea82148ef615a73
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, identified as a link farm. The primary URL, https://traffking.ru/123?keyword=ilusiones+richard+bach+pdf, suggests a potential SEO manipulation or content distribution scheme. The presence of numerous links to other PDFs on disposable hosting services indicates a likely attempt to distribute malicious content or engage in click fraud, rather than providing legitimate information.

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://traffking.ru/123?keyword=ilusiones+richard+bach+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8887aea60d7.pdfIn PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/putifakusizo.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/jusidekevugeru.pdfIn PDF document text
    • https://gejovekozeja.weebly.com/uploads/1/3/4/4/134401956/1640143.pdfIn PDF document text
    • https://lilepixot.weebly.com/uploads/1/3/4/4/134462463/c4ebd2fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5fa32e3370c99.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/1482587.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/b79b8f95-322d-44c3-bfa1-82d9497e2080/nordictrack_treadmill_manual_t5.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1cc8fc-3803-435a-987e-52165de6a438/one_piece_download_english_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec0b8d15-493f-4cc7-aeb9-3a50e1b2b1d7/86767904243.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/d_d_5e_free_adventures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec554683-3a99-4859-9371-0d3061d52921/51550574730.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_off00004b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B51 5320 bytes
SHA-256: f712676a7c439083863925e874b20bab7fdca4b29c683a5186f56d49cd040f37
font_01_sfnt_off00005d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D58 9860 bytes
SHA-256: f857ea99886d2131e0e2461b675a8a055cc89578022afeb5774183a516d1c502

Open this report in the interactive analyzer, or submit your own file for analysis.