Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2e932af1db7e99…

MALICIOUS

PDF

87.5 KB Created: 2021-05-25 09:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5956e6d0034f7741f8aa42e2ca0c68a5 SHA-1: c338d5bcfa3738ef79b838ca6ac70e642f326f6f SHA-256: 2f2e932af1db7e991b4f5bce582caaf05418925c803a26d60c3a3801c398ec52
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirectors, indicating a link farm designed for SEO manipulation or phishing. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure for downloading a movie, which is a common tactic for distributing malware or conducting phishing campaigns. No scripts were extracted, but the extensive use of malicious links suggests the primary goal is to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://dafemum.ru/strik?utm_term=gods+of+egypt+full+movie+hindi+dubbed+free+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4370288/normal_5fe3488d5bd13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_602af92de0299.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/kesit_povazobuzome_lavigifikatave.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/3e240327bb2.pdfIn PDF document text
    • https://xanuvewetarew.weebly.com/uploads/1/3/4/7/134732967/cb5c1.pdfIn PDF document text
    • https://dipojujepu.weebly.com/uploads/1/3/4/5/134526160/vabesiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425723/normal_5fcbd0855f905.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/jipamogunegoxawoni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5fc8622aca8a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450883/normal_6026826758db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_606382042fa4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_606661bfe267d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_6023a8cd0c5e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450427/normal_602d559ef28ff.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/796cd987-480f-41df-956e-ca8cb33d4be4/krauses_food__the_nutrition_care_process_14e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ce3005-60f6-4d88-b883-a3fdb7950a9d/bizofibowovexajaki.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/tesorifimo.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/41661598292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f97d3f-2fcd-4aba-bd57-570a00db0d92/30049883301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664f2ee2-c927-4dc9-88e9-45246df52b6e/79499302445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728dbb7d-6c06-4a26-a161-78bf5ae7e69e/mulolupizugelevopimomizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c8244b-7517-4969-8ac8-d570d4809620/17289791499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfedfcf4-d38f-4176-9701-4ff2288e938e/plantar_fasciitis_exercises_kaiser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffada275-64a8-4777-a30e-ed0e37ab5940/69356514704.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/pujitu.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B6 5880 bytes
SHA-256: fee84ae0a8cc990847de743425a362e0e5035c0966d12f6d2d6f96c129bf9196
font_01_sfnt_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 7512 bytes
SHA-256: 1a9a46a984d3bc02b934f6474fe69498b35932168f9ee6726a16c8ebe1d246e2
font_02_sfnt_off000110d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D4 11704 bytes
SHA-256: 6b040ae307c56fdb7dc148add41826a7010e4bec505281dd4b3f518c63966877
font_03_sfnt_off000138f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F9 16348 bytes
SHA-256: 0c29cdbda190d51eeedd2142782971c88bc2fbab6b1b1a2398f6629ee5e7833b

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