PDF malware analysis — malicious · e21bda52244e197d

MALICIOUS

PDF

82.0 KB Created: 2021-05-21 19:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16

MD5: d068c99dcac2c45a36fad09bb0e2d3e6 SHA-1: 4250ae0558606788ef996d05883fdaf9743e9bd5 SHA-256: e21bda52244e197d26a08175189018476abe35e7810f908f69e82a7fbcbe6d8b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing numerous external links, many of which point to PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://jumiwimov.ru/strik?utm_term=how+does+solar+energy+work+step+by+step+pdf', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/strik?utm_term=how+does+solar+energy+work+step+by+step+pdf PDF link annotation
- https://korisupugi.weebly.com/uploads/1/3/5/3/135308649/zonisusukena-fosod-rexire.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370530/normal_5fe8ddc2c0a72.pdfIn PDF document text
- https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/865c1b3ff08f6.pdfIn PDF document text
- https://nelubetif.weebly.com/uploads/1/3/5/3/135322580/bubufijofajame_sudimomomozitut.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4458122/normal_5fcbb3e061f4c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456728/normal_601384edccc16.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403130/normal_6014266d45af4.pdfIn PDF document text
- https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/guganutip.pdfIn PDF document text
- https://lozatovetifeg.weebly.com/uploads/1/3/3/9/133999134/siwixixofosigakuxupi.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://s3.amazonaws.com/boduxatavepe/pt111_g2_weight.pdfIn PDF document text
- https://s3.amazonaws.com/pilazi/nubowababofudugexeka.pdfIn PDF document text
- https://s3.amazonaws.com/numunenoji/papuke.pdfIn PDF document text
- https://s3.amazonaws.com/gekixadonuru/jekezegowifawa.pdfIn PDF document text
- https://s3.amazonaws.com/ninazarila/82189550128.pdfIn PDF document text
- https://s3.amazonaws.com/juliziwojatige/30381719188.pdfIn PDF document text
- https://s3.amazonaws.com/nademopor/xebemepebivibufited.pdfIn PDF document text
- https://s3.amazonaws.com/galinikagopit/zesiriperadufemurigutadu.pdfIn PDF document text
- https://s3.amazonaws.com/jevelel/capricho_arabe_piano_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/wetowuzuxit/dash_rapid_egg_cooker_recipe_book.pdfIn PDF document text
- https://s3.amazonaws.com/lokijuronig/hollywood_reporter_list_of_top_film_schools.pdfIn PDF document text
- https://s3.amazonaws.com/pisedij/shinedown_attention_attention_bonus_tracks.pdfIn PDF document text
- https://s3.amazonaws.com/memobofilenabon/insect_identification_guide_book.pdfIn PDF document text
- https://s3.amazonaws.com/dusubonifu/2577582771.pdfIn PDF document text
- https://s3.amazonaws.com/vovopafubipu/android_9_samsung_novidades.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f599.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF599	5308 bytes
SHA-256: `0a2e746d7e21db690d5f7c10645cca84f6d41044ab61fa4e9fb5609722e39f5b`
`font_01_sfnt_off000107c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107C8	10680 bytes
SHA-256: `03177b2ebebbd2240657225c7c2dbb0a1b059a9d680448cd2019ac6a0f0e4d94`
`font_02_sfnt_off00012c42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C42	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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