PDF malware analysis — malicious · 3b79469ac88ba7db

MALICIOUS

PDF

77.8 KB Created: 2021-01-26 17:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: f103f390684c4bccdc0f92dc31c4c66e SHA-1: 207aa9f7d6d3b9094165fe095cb4383197933b65 SHA-256: 3b79469ac88ba7db189f3b15e203c21d9b7c79abe80c58d609651e9147cbef10

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 attempt. The document contains a large number of embedded links, many pointing to disposable domains and potentially malicious redirectors, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent to redirect users to harmful content or download further payloads.

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://gettraff.ru/wb?keyword=shiny%20zigzagoon%20pokemon%20go%20odds In PDF document text
- https://cdn.sqhk.co/letaziseb/hbFCfjf/cnc_machine_for_sale_amazon.pdfIn PDF document text
- https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/giletife.pdfIn PDF document text
- https://cdn.sqhk.co/fijajiles/gfkYggx/how_to_block_out_traffic_noise_in_bedroom.pdfIn PDF document text
- https://xobojurum.weebly.com/uploads/1/3/4/5/134599739/26329d3168.pdfIn PDF document text
- https://cdn.sqhk.co/wediximewoza/jfBjegh/bivojupaweruxiwijapeteto.pdfIn PDF document text
- https://melajepanaxon.weebly.com/uploads/1/3/5/3/135398769/ruvomivew.pdfIn PDF document text
- http://setlyb.online/827587443406wxck.pdfIn PDF document text
- https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/voxazavafatu.pdfIn PDF document text
- https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/vuvozetum-dosawexuva-zonixoriraxus-finulatexuzetol.pdfIn PDF document text
- http://denizan.com/64210405331qofpw.pdfIn PDF document text
- http://reduslimitalia-official.site/50094048405cptta.pdfIn PDF document text
- http://scandisvet.ru/slice_of_life_anime_2019v6r0f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/safenalavojuwu/pufero.pdfIn PDF document text
- https://s3.amazonaws.com/nemafu/pevujezumo.pdfIn PDF document text
- http://zakivijojinikij.epizy.com/7248482186.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000e126.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE126	6588 bytes
SHA-256: `fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a`
`font_01_sfnt_off0000f1a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1A0	5564 bytes
SHA-256: `c48a93201f2fbd99cf67bf31d1147a62a1d6ed8bb0d1bfe153a73047ec78b08d`
`font_02_sfnt_off00010479.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10479	10932 bytes
SHA-256: `2eb83f9b76dffea2017d64920176b408e9075da56fa832d84a25cb29760308d9`

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