PDF malware analysis — malicious · 6174d86396b9e528

MALICIOUS

PDF

90.0 KB Created: 2021-03-05 18:25:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 7ce825daf9d13764b0134f33f880daf1 SHA-1: 269d8a6bb65f302dcf492db2c32e62aa1b8a75da SHA-256: 6174d86396b9e528b111e52fa896a64701dc0889c2b26fdbfe9fe002a0cf75a3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm designed to obscure malicious activity. One prominent URL, https://vilenefex.ru/strik?utm_term=how+to+find+the+inverse+of+an+identity+matrix, is flagged as suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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://vilenefex.ru/strik?utm_term=how+to+find+the+inverse+of+an+identity+matrix PDF link annotation
- https://static.s123-cdn-static.com/uploads/4428083/normal_5fd09213d73d9.pdfIn PDF document text
- https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/wumunofafalisuder.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485310/normal_5fd799815b1d0.pdfIn PDF document text
- https://wekowegalovu.weebly.com/uploads/1/3/4/6/134668649/lumaxagal.pdfIn PDF document text
- https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/95ae32675e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417664/normal_603e34cbaebca.pdfIn PDF document text
- http://javaxirivibewi.mygamesonline.org/41575546911.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369796/normal_5fe0f7130ea2a.pdfIn PDF document text
- http://fisareboveda.getenjoyment.net/how_to_replace_a_water_heater_element.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467043/normal_5fe70657b8111.pdfIn PDF document text
- https://zexirajeroluwub.weebly.com/uploads/1/3/4/8/134848753/tiwilosalemo.pdfIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_2d835a922c8c4755a3d5f86ab720a0cf.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pibajuwi/manogixobeji.pdfIn PDF document text
- https://s3.amazonaws.com/lixuzo/rokatuzuwodamamulotaj.pdfIn PDF document text
- https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_5fb3e9ca2394444f9c555d0c62a7d565.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vifusupegiza/67657835155.pdfIn PDF document text
- https://s3.amazonaws.com/wewiro/nccn_guidelines_hodgkin_lymphoma_2016.pdfIn PDF document text
- http://ziwivazud.onlinewebshop.net/dilak.pdfIn PDF document text
- https://s3.amazonaws.com/nuxulikiwab/89622990687.pdfIn PDF document text
- https://s3.amazonaws.com/jepinebawo/identify_colors_worksheets.pdfIn PDF document text
- https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_dfdd0db523074f4aa7c05040cc11e018.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/dakebesuvum/a_dance_with_dragons_theon_chapters.pdfIn PDF document text
- https://s3.amazonaws.com/vavejijitatofu/bissell_proheat_pet_upright_carpet_cleaner_1799_manual.pdfIn PDF document text
- https://s3.amazonaws.com/pajeriramal/marathi_bhajan_free_app.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://www.gnu.org/licenses/gpl.htmlIn 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
`stream_003_off00010a6d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x10A6D	15548 bytes
SHA-256: `b01cfc3ad225465b5d63355bf88313a145fb8b70ca251904f809b572e8ce4579`
`font_00_sfnt_off0000f82a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF82A	5396 bytes
SHA-256: `2394d0183d804f5f960764ddaa74bcf6a2e2f55b6e1e466fa61f67b8ee469319`
`font_02_sfnt_off00013524.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13524	10688 bytes
SHA-256: `dcf640ecb5931b4b97721c9a6b8109d3a3863c1d6823d59b3610ba1646d0bbb7`

Open this report in the interactive analyzer, or submit your own file for analysis.