PDF malware analysis — malicious · 5d8e22f4afbc0695

MALICIOUS

PDF

86.7 KB Created: 2021-03-03 14:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: 61fd8933cfffb7639236acd113d3991d SHA-1: 68b9567fe31bc0089deabac91abdc873e963f864 SHA-256: 5d8e22f4afbc0695f31310fc58f572bea8437feb676779dd9260a6e8658766ff

226 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be intended to trick users into providing passwords for encrypted archives, a common tactic to bypass security scanners.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://nipisod.ru/123?utm_term=baixar+livros+espiritas+gratis+para+android PDF link annotation
- https://voxesisa.weebly.com/uploads/1/3/4/3/134349259/ximedodonuxapetakox.pdfIn PDF document text
- http://jalazekesofijot.medianewsonline.com/is_chaos_good_or_bad.pdfIn PDF document text
- https://wazafalesozem.weebly.com/uploads/1/3/4/4/134498636/vuzelegenatab_widazomadeduxi.pdfIn PDF document text
- https://cdn.sqhk.co/zogobadakedu/ifDKikM/watch_house_party_2013.pdfIn PDF document text
- https://cdn.sqhk.co/bowawugafux/aie2PfF/83847213520.pdfIn PDF document text
- http://mumolazesinidix.getenjoyment.net/nutrition_care_process_pes_statements_examples.pdfIn PDF document text
- http://subuxiwubemew.getenjoyment.net/star_citizen_ships_listed_by_cargo.pdfIn PDF document text
- https://cdn.sqhk.co/betarudigi/jiieicf/80384492568.pdfIn PDF document text
- https://cdn.sqhk.co/kewixoretuze/kAjfheN/real_gangster_vegas_crime_game_download_uptodown.pdfIn PDF document text
- https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/e3b44.pdfIn PDF document text
- https://cdn.sqhk.co/wujakegu/iajakgc/oil_price_news_now.pdfIn PDF document text
- https://mirajaxudedina.weebly.com/uploads/1/3/0/7/130775596/jotatuxaxukuli.pdfIn PDF document text
- https://kovuvewu.weebly.com/uploads/1/3/2/6/132695697/xejuvijikexas.pdfIn PDF document text
- https://cdn.sqhk.co/vijasezadida/jijvhc6/physics_toolbox_sensor_suite_ios.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://sutexuvidag.myartsonline.com/kibebabiduf.pdfIn PDF document text
- https://s3.amazonaws.com/mukutud/sony_a5100_manual_guide.pdfIn PDF document text
- https://s3.amazonaws.com/xukirizugukugi/chromosome_structure_and_function.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_off000103c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103C9	5092 bytes
SHA-256: `0082e892ce5b401e544b1deaf397ee31dbefe4a6e06b0ed82e73815baee781a8`
`font_01_sfnt_off0001152e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1152E	13372 bytes
SHA-256: `a0b560a6acd2862b07fbdfb9402d7f25b4d91987b478f9ae7a73aa54c9774269`
`font_02_sfnt_off00013d5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D5F	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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