PDF malware analysis — malicious · f2bf71a7721a89a4

MALICIOUS

PDF

80.8 KB Created: 2021-06-04 21:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 2963b9b9b1a0ee8a06da1be8e2ba4cc6 SHA-1: ad7fd68994ac6ffbeec3395456287297eedc55df SHA-256: f2bf71a7721a89a427bb557dd1984636348895d9af3da29d8e2e09d66b8f18e1

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL pointing to 'golowaki.ru', which is likely used to redirect the user to a malicious site. The presence of PDF-specific heuristics related to link farms and external URIs further supports a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://golowaki.ru/123?utm_term=lp+dan+askep+bblr+pdf PDF link annotation
- https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/9d372eb914ca5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387931/normal_603a69a96e566.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463298/normal_600aa397b30ec.pdfIn PDF document text
- https://tisowatotaf.weebly.com/uploads/1/3/4/6/134660149/d185ad4af6abcdf.pdfIn PDF document text
- https://bizupuligal.weebly.com/uploads/1/3/4/6/134603830/4686789.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377128/normal_5fec25495991f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4464082/normal_5fd06d73c9fdc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450889/normal_5ff313d815197.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387931/normal_5fdb391be1ff1.pdfIn PDF document text
- https://jojimixumomural.weebly.com/uploads/1/3/4/4/134438106/9049873.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370055/normal_5fd7a1a036b92.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460725/normal_5fdcbb28a9302.pdfIn PDF document text
- https://nulesurusisozi.weebly.com/uploads/1/3/4/7/134744420/resuwoz.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://mumasenekera.pbworks.com/w/file/fetch/144619212/barfi_full_movie_1080p_download.pdfIn PDF document text
- http://gibuwodebu.pbworks.com/w/file/fetch/144571071/tudifaguwe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d4091278-4f07-4a72-b7e1-cb77b6a1b616/kozufupape.pdfIn PDF document text
- http://bofamawetodo.pbworks.com/f/39018140531.pdfIn PDF document text
- http://zusemivak.pbworks.com/w/file/fetch/144538869/are_stomach_toning_belts_any_good.pdfIn PDF document text
- http://nitezug.pbworks.com/f/how_much_is_a_reduced_fare_metrocard.pdfIn PDF document text
- http://doxawadar.pbworks.com/w/file/fetch/144495294/4267942199.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3a9d760e-17d9-4f16-be07-e5d9a4d553f9/758414610.pdfIn PDF document text
- http://wojipag.pbworks.com/f/how_much_does_carvel_ice_cream_cake_cost.pdfIn PDF document text
- http://xuruzinijub.pbworks.com/w/file/fetch/144422337/how_to_pass_the_bcba_exam.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f777.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF777	2024 bytes
SHA-256: `e81454584333ca0053269bd2b73a3b98c692e15c8237cf9fe2cc91d1401f19af`
`font_01_sfnt_off00010084.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10084	5180 bytes
SHA-256: `6651cad1a52aebf9cc4353e38da8d55e2cced43ce27bcfe8f3643890bf87d2fd`
`font_02_sfnt_off0001122f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1122F	10376 bytes
SHA-256: `c3dab17f62cf39bad34ef9f1ea6fd1e71afe52716cd47f7dbf67db03f29a20a5`

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