PDF malware analysis — malicious · aa715a36f58831b1

MALICIOUS

PDF

137.7 KB Created: 2021-03-14 04:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 558eaf9e5b7fc3f60d45ead677160d84 SHA-1: 2dca935172afed639c29895b80041a86f53fcd5e SHA-256: aa715a36f58831b1749ae37322558e9ad0d835d362f2517a981f1b95e553dcc5

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 potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary malicious URL identified is 'https://pelibifir.ru/strik?utm_term=powerflex+525+manual+fault+reset', which is likely part of a phishing or SEO spam campaign. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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://pelibifir.ru/strik?utm_term=powerflex+525+manual+fault+reset PDF link annotation
- https://static.s123-cdn-static.com/uploads/4495257/normal_5ff0058ceb806.pdfIn PDF document text
- https://sutomoloxoxe.weebly.com/uploads/1/3/5/9/135986515/duguj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457854/normal_60321597cc7e3.pdfIn PDF document text
- https://pesosadat.weebly.com/uploads/1/3/4/8/134885101/932fc.pdfIn PDF document text
- https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/7489956.pdfIn PDF document text
- https://rovalexi.weebly.com/uploads/1/3/4/5/134598456/9cc97.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4470698/normal_5fc858c396363.pdfIn PDF document text
- http://madoxorijegobe.sportsontheweb.net/brother_hl-2170w_setup.pdfIn PDF document text
- https://subinekole.weebly.com/uploads/1/3/2/6/132695692/zeluvamanafuxuvusi.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In 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/2b1645d2-3a96-45e4-b692-ab15f2b9f752/54692967028.pdfIn PDF document text
- https://s3.amazonaws.com/woneketelak/what_is_timex_indiglo.pdfIn PDF document text
- https://s3.amazonaws.com/geraromu/conduct_disorder_rating_scale.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/77739b91-bfc3-47ed-8681-a040bc862265/how_to_write_an_environmental_impact_assessment.pdfIn PDF document text
- https://s3.amazonaws.com/fonibinaraj/cartoon_yourself_photoshop_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e8e0e283-2155-4333-9bb2-20cf806d9e74/vuvipexopubujulexozepav.pdfIn PDF document text
- https://s3.amazonaws.com/pekatikisuruki/celtra_duo_clinicians_report.pdfIn PDF document text
- https://s3.amazonaws.com/jemazejodep/44626260086.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3f2d888c-7c17-489e-92cc-f0109bd42469/what_was_peters_character_in_the_bible.pdfIn PDF document text
- https://s3.amazonaws.com/wovitiku/sarcophagus_template.pdfIn PDF document text
- https://s3.amazonaws.com/divelikubapiwaj/52818995082.pdfIn PDF document text
- http://tiwatimab.atwebpages.com/pajemenaf.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/df423e7f-f1f1-4713-a7d0-6b566f361639/rakutoworino.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001c63b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C63B	1708 bytes
SHA-256: `eb0b87445f4647f30bf4435cbd7ece65da4ef4a1221230cdbe76e127c6b85938`
`font_01_sfnt_off0001cea1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1CEA1	5164 bytes
SHA-256: `82166c6efdaaa15975fbcdade91616747c6437217a503bf0b6fe07de1d6db735`
`font_02_sfnt_off0001e02e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E02E	12524 bytes
SHA-256: `5b4b593f4af52efd9bcb7833d02c3c0113f137e9171f22a1a9b8319d71d353fd`
`font_03_sfnt_off00020a2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20A2C	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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