PDF malware analysis — malicious · 910196b19421dcd1

MALICIOUS

PDF

72.2 KB Created: 2021-03-23 08:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c9ff32791a2e273e698ce804c647f7a1 SHA-1: 3c73878a5c4288cdbb7c7e92c9f58b9601a20667 SHA-256: 910196b19421dcd1c9ec4badab59cf9b625897646edc8c934e6f77caf2c98efb

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains, characteristic of SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
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.
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://bologen.ru/wix?keyword=toro+sprinkler+timer+manual PDF link annotation
- https://cdn-cms.f-static.net/uploads/4416136/normal_602a533ad38bb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476593/normal_5fe782094b453.pdfIn PDF document text
- http://formverifiedbadge.com/how_to_get_minecraft_on_a_samsung_chromebooko6nwz.pdfIn PDF document text
- http://study-english-04.space/komakinizazuzufuns4a6.pdfIn PDF document text
- https://cdn.sqhk.co/vakenuda/e2sjg6P/5095212509.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422161/normal_6057ac3c15e74.pdfIn PDF document text
- https://cdn.sqhk.co/vimexuda/ijeidhc/kunowikima.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467003/normal_601a3be9e9235.pdfIn PDF document text
- http://medway24.com/bebufurilibusosqanz.pdfIn PDF document text
- http://fredo.bike/gupasiwu0qyud.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370762/normal_6030725ba4ada.pdfIn PDF document text
- http://zhenskiizhurnal.ru/casio_solar_watch_bandkuf7n.pdfIn PDF document text
- http://potolkilife.ru/algebra_1_word_problems_worksheetw2eix.pdfIn PDF document text
- https://cdn.sqhk.co/vopupevomate/thegg6B/56710949930.pdfIn PDF document text
- http://bestsalestoday.xyz/bajirao_mastani_full_movie_with_english_subtitles_fmoviesi0jeo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479705/normal_601ab79dc2084.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4383131/normal_5fc950d501027.pdfIn PDF document text
- https://cdn.sqhk.co/wefopijupe/k9Kqih7/mesobilojevanofe.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
- https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_5991b0c1de274392902b14df3b303ef5.pdf?index=trueIn PDF document text
- https://000bb656-a8cb-4e8b-9327-0b0ec99f56fe.filesusr.com/ugd/3f812e_38681e9b685e49e3994c0e3415c42ba4.pdf?index=trueIn 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_off0000d363.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD363	4860 bytes
SHA-256: `6e10acdfb1f23b1bce083f79dd9e5dc977ce1ed9a68c49c19549f3fa450f1f08`
`font_01_sfnt_off0000e3ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3CA	9708 bytes
SHA-256: `7df14a446dc6cf3baa138e500481113829ba2a3c1eca09e19e0692d5d903b7d0`
`font_02_sfnt_off0001051b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1051B	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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