PDF malware analysis — malicious · 009f08b188bc5657

MALICIOUS

PDF

77.4 KB Created: 2021-05-31 00:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: c5df1b13179f5e4ed41e7feb1d13c07a SHA-1: 7544044b8063f5a5c2ebb5b41e30a69e26fa7f57 SHA-256: 009f08b188bc565735413ee235828689d4e6f923179c09d52cec81e904b8b61d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or link-farming attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

Heuristics 5

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.
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://druttle.ru/strik?utm_term=use+boast+in+a+sentence+noun PDF link annotation
- https://cdn-cms.f-static.net/uploads/4393515/normal_5fd0ed23797c3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476924/normal_600b4084da0d3.pdfIn PDF document text
- https://mijeridofuba.weebly.com/uploads/1/3/4/6/134677835/kosipeku.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485454/normal_6025b3e354040.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376086/normal_5fd2002dd2e1d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412761/normal_6069c8831f46e.pdfIn PDF document text
- https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/4b822.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372080/normal_6066bae7ecf78.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4492257/normal_6055cc052fd07.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368495/normal_5fd7f63f46f66.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382187/normal_5ff7554ecb77b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4376374/normal_5fee74d633969.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446017/normal_5fd72b6f9249c.pdfIn PDF document text
- https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/duris.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415782/normal_6038812aec740.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453729/normal_603c1cad15522.pdfIn PDF document text
- https://sovakevu.weebly.com/uploads/1/3/4/3/134341498/3166766.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4404523/normal_6008a401b2a4b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4497368/normal_601778cc72597.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454691/normal_604a2f2454e26.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404959/normal_6009c0dd894b8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/5aea7c20-a718-4f2e-a774-d3c588be85b0/legit_paypal_money_adder_no_survey_online.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ee27c6f4-55f4-425b-89d9-27a2f5a4faad/who_are_the_minor_characters_in_a_christmas_carol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/06e0e9bc-414a-4219-9ed1-38c8c55a1b13/gufusuk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/796439cd-275b-4bc8-b85e-e1b01c12b5a6/deep_house_electronic_music_artists.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6c81db8e-1708-4607-a4f1-52fb58b7d07d/game_of_thrones_season_8_episode_3_download_reddit.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0A0	4796 bytes
SHA-256: `fba87666b68969c529908e6c90b413a7e9e16d766540c35a9676612693bde0f1`
`font_01_sfnt_off00010109.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10109	11460 bytes
SHA-256: `84d59cff1bb196afa86d597f809356478f79e2c69221510e813e2b03a6c01152`

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