PDF malware analysis — malicious · 8aa548e53509f7bd

MALICIOUS

PDF

73.5 KB Created: 2021-01-09 19:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: e92a6cdfb8dc6c4b12df9897289ef7f1 SHA-1: bf910e11fe16954f4896a4c878da4accb919f886 SHA-256: 8aa548e53509f7bdbec10db7482a970737d1bec3c50f44f53623958dd6afefdb

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution lure. It contains a large number of embedded URLs, many pointing to disposable hosting services and a redirector, suggesting an attempt to obscure the final malicious destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://traffking.ru/aws?utm_term=android+9+wps+root In PDF document text
- https://site-1166703.mozfiles.com/files/1166703/wind_up_bird_chronicle_download.pdfIn PDF document text
- https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/dorajedog.pdfIn PDF document text
- https://muzitotixigo.weebly.com/uploads/1/3/1/4/131407705/9a3a30f53.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410217/normal_5fd347b714ca6.pdfIn PDF document text
- https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/1201892.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384318/normal_5fa1a811dbf0e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365628/normal_5fad9f8c62906.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371808/normal_5f8c8dc068901.pdfIn PDF document text
- https://pezitojuxesuvog.weebly.com/uploads/1/3/4/6/134608136/488253.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375070/normal_5fe60d0d8dc55.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494677/normal_5fadec6e3011a.pdfIn PDF document text
- https://site-1177219.mozfiles.com/files/1177219/art_collection_color_by_number_unblocked.pdfIn PDF document text
- https://site-1168346.mozfiles.com/files/1168346/boardgamegeek_top_100_war_games.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476126/normal_5fd6cf0c766f5.pdfIn PDF document text
- https://cdn.sqhk.co/monasomeb/heHEplF/frog_hop_game_solution.pdfIn PDF document text
- https://cdn.sqhk.co/nupegefozub/jiyd6dW/survival_island_evo_2.pdfIn PDF document text
- https://site-1174448.mozfiles.com/files/1174448/goblin_defenders_2_hack.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d35a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD35A	4616 bytes
SHA-256: `25d8e378f260f3e650daee733ee39c544676042104e009f3765fbeee202b9d13`
`font_01_sfnt_off0000e319.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE319	11340 bytes
SHA-256: `16b00b892ebef2a55b2603881fb0c62eecb60f17f3240383c6dfb9e79865be57`
`font_02_sfnt_off0001099a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1099A	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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