Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2edd4945a64bbd1…

MALICIOUS

PDF

43.3 KB Created: 2020-11-09 10:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5cc40ebf1dc1fd9a708207b86b87e314 SHA-1: 21953be89e76d72c2e649f0c5fa14a3cf24afdac SHA-256: d2edd4945a64bbd1dc6bda0ecd9bad306d5c14b9ec850fb665260c4529b54fe1
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://trafffi.ru/aws?keyword=how+does+texting+affect+our+social+skills PDF link annotation
    • https://farupixin.weebly.com/uploads/1/3/4/3/134314126/8b46b34bc83c.pdfIn PDF document text
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/7282939.pdfIn PDF document text
    • https://lejonajij.weebly.com/uploads/1/3/4/6/134651266/rolapigije.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/a2820.pdfIn PDF document text
    • https://tapuroxoj.weebly.com/uploads/1/3/4/5/134599682/674d5ef60c.pdfIn PDF document text
    • https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/wuzokeziv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sudufafi.files.wordpress.com/2020/11/95569674273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22791eb-fa58-4145-b433-baba45573d7e/ibiza_best_beach_hotels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062f040e-5810-4deb-adc8-6bac76a8857c/pobufupadijefutevanobuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119500bd-13f2-4f37-8760-751bea1a6323/pigenezevuzigofaxale.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/rf_amplifier_design.pdfIn PDF document text
    • https://jivibizi.files.wordpress.com/2020/11/dc_shunt_motor_working_principle.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_off00006aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA0 5372 bytes
SHA-256: 0d3f4cb3ba656ab8aa1b68a152fb0322b8048f441e3ad521899a8db073be3f9c
font_01_sfnt_off00007d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0F 10380 bytes
SHA-256: 7f77315c3ccfa8e625e3edaa76471984cde64b0d04096af94112195363f9932e

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