Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8e12e90eb2c8e4…

MALICIOUS

PDF

49.6 KB Created: 2020-11-09 11:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5f3fa55ec65d413d3cd6e800d73e6059 SHA-1: 9830cab7a04a39e9749c4cd25c6840caeff94d86 SHA-256: 0e8e12e90eb2c8e47bbb8a774411ca61eb970801967ca47371618c0f756f0ca5
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the structure suggests a link farm designed to direct users to potentially harmful websites. The presence of multiple links to disposable hosting further supports a malicious intent, likely for SEO manipulation or phishing.

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/123?keyword=slide+glide+lite In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_5f9b2d251c733.pdfIn PDF document text
    • https://jawogebewo.weebly.com/uploads/1/3/4/3/134369376/verarateridira.pdfIn PDF document text
    • https://finijuzado.weebly.com/uploads/1/3/4/4/134444754/winexemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_5f96699004546.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/3111232.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/zasidevipobimix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_5f92f02bc09e1.pdfIn PDF document text
    • https://jetizapu.weebly.com/uploads/1/3/4/3/134371104/4a46d05.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/mubabuxud-luwobof-xexoton-nowaxanowekevin.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/kupovapifin-duduxufir-sadedowusi.pdfIn PDF document text
    • https://foretenam.weebly.com/uploads/1/3/4/7/134700633/5085573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_5fa3ad4d56fd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5fa1e3dd42afc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8f7fdd34bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f9bd9a4a4f45.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
    • 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_off0000771e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771E 4184 bytes
SHA-256: db10cb871cc410cdab96cc9e1c2b0898937445e78686ce21d354746329a89f9e
font_01_sfnt_off00008550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8550 11248 bytes
SHA-256: e14019bfc46539940f0902e60306fa345a05c98f2430cd52be212526355708e4
font_02_sfnt_off0000ab7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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