PDF malware analysis — malicious · 75e6bb43575bc92c

MALICIOUS

PDF

78.7 KB Created: 2021-05-24 10:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 03648ae5dc39b1fed0d0127f986c1a8c SHA-1: 953b4b4555b96ab498652227582237dc661baffb SHA-256: 75e6bb43575bc92c3018daaad5cdfeb6ad2f3ceba81a713a13838bf064192628

176 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 QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. 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-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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://dugedepap.ru/strik?utm_term=3+digit+addition+without+regrouping+word+problems PDF link annotation
- https://static.s123-cdn-static.com/uploads/4427295/normal_6000fdfbd3620.pdfIn PDF document text
- https://revarepafe.weebly.com/uploads/1/3/3/9/133997647/sajizegitiji-wujuse-bimake-podowisut.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4493597/normal_602adc0c384ea.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370762/normal_5feeaad0aaf37.pdfIn PDF document text
- https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/8889271.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393901/normal_6022c80b4c269.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370989/normal_603c2bd0c9ec9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453556/normal_603a8268bf360.pdfIn PDF document text
- https://fopepusev.weebly.com/uploads/1/3/1/3/131383694/e74d0b2.pdfIn PDF document text
- https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/7358137.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/4a3f24c2-a5f2-43bd-a9af-06c149a8bfaa/forex_technical_analysis_course.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/389d3a7e-ec3a-454a-b63b-238af13bfbd8/12938633461.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dee193c8-7130-42f1-85da-218e237f845a/tekegalafi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/78244338-9bad-47d9-b0e2-6a3922ccaee4/quotes_about_mental_toughness_in_basketball.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2b9a1441-afd2-430a-8e37-bfbf09c49d2f/67189486773.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/50ab9f56-372b-4ba0-b97a-3e3a6c76bcc4/what_do_you_study_for_real_estate_license.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/90dcca99-868f-4238-bc4b-db37e0fe4b9c/labut.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6f962d3e-771a-4fd0-bd25-ac081025460d/10_steps_to_successful_breastfeeding_ppt.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8176aed0-63d2-4c9a-815c-59cc0466949a/95815377741.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/303cf73a-6703-46d3-9cb5-d29921854d0e/71378179721.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_off0000d1ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1EA	5672 bytes
SHA-256: `3306e82551f91f6ce5516765c28b8d2b0d1ed93038a9f5537095b3ba2cf940fd`
`font_01_sfnt_off0000e50c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE50C	2352 bytes
SHA-256: `7510ffe215888d7510626e986e5697a7695946505b136c407f532b2343225dfc`
`font_02_sfnt_off0000efb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB0	10364 bytes
SHA-256: `d071ca04f3b06a83169317093c5a051d43db49899bb38ffca0f81e32fb8a2030`
`font_03_sfnt_off00011373.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11373	17128 bytes
SHA-256: `79df216882666323d995e94bace2c956f176b104a264b2e9e5aaf3e4cf59ca98`

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