PDF malware analysis — malicious · baffce9d487215d9

MALICIOUS

PDF

94.9 KB Created: 2021-01-05 01:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 3a35ae7693b348606b67569484e2eeb8 SHA-1: 91752672323a6bf80e47656784124e01236a8db3 SHA-256: baffce9d487215d9a343f66d2f549490c007256710c5000a5fdefc2acf392661

254 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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
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://ggtraff.ru/123?utm_term=teclado+alfanum%25C3%25A9rico+para+que+sirve In PDF document text
- https://static.s123-cdn-static.com/uploads/4367297/normal_5ff22811ce694.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408996/normal_5fa14cd5b4823.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375694/normal_5fb2ad8f74653.pdfIn PDF document text
- https://jugotogosef.weebly.com/uploads/1/3/0/8/130814460/5878528.pdfIn PDF document text
- https://vavetupabon.weebly.com/uploads/1/3/3/9/133999816/fozasifu.pdfIn PDF document text
- https://tobopitoru.weebly.com/uploads/1/3/4/8/134872655/xexujavujekef-govomitunasazol-lemuwomunizem.pdfIn PDF document text
- https://xopugexufejan.weebly.com/uploads/1/3/4/7/134709921/d395973c8.pdfIn PDF document text
- https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/valewuweg_bababipasan_bobetigezapi_kuxim.pdfIn PDF document text
- https://tolirufatava.weebly.com/uploads/1/3/4/8/134879039/1027796.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4458829/normal_5fe22bbcb1588.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4490934/normal_5fc65ccb2fb4b.pdfIn PDF document text
- https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/defogixipuliko.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413017/normal_5ff1efd33855c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378620/normal_5f8abee5b99f8.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://uploads.strikinglycdn.com/files/9193b3d3-18f1-4115-9ef7-5384f7ce0220/sex_position_book.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010c11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C11	5380 bytes
SHA-256: `aa051c0f412495dd9d36e87e979a2cfa5aae268bb3d5302332f30f4f1422efcd`
`font_01_sfnt_off00011df1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DF1	12592 bytes
SHA-256: `61fb41c30d460db83ac614b3bf36124bc7f8c3d5aa52c3df2dc9a8127a106550`
`font_02_sfnt_off0001475f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1475F	16608 bytes
SHA-256: `b055ed7b5aab1832885e51ee1bf3658e2739573497d06df853c1bd92d334b2bb`
`font_03_sfnt_off00015e09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15E09	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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