PDF malware analysis — malicious · b85742d5dc2bc796

MALICIOUS

PDF

81.5 KB Created: 2021-04-17 14:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: a38b24fb6f91204c15288bb1b180c479 SHA-1: ce9c5c97107f6c2cc999e915dc27c327e69aa6e7 SHA-256: b85742d5dc2bc796417f14dce7589b546696dcf62b7ff381e2ff5201b937c2b5

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a technique often used for SEO poisoning or phishing. The primary lure URL, 'https://botokaw.ru/strik?utm_term=inductrix+fpv+plus+frame+upgrade', is associated with a redirector, suggesting it leads to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://botokaw.ru/strik?utm_term=inductrix+fpv+plus+frame+upgrade PDF link annotation
- 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
- http://susofukezozuwuj.epizy.com/19660317943.pdfIn PDF document text
- https://s3.amazonaws.com/nonabafat/boss_hogg_outlawz_serve_and_collect.pdfIn PDF document text
- https://s3.amazonaws.com/fedojigudaj/adding_three_fractions_with_different_denominators_worksheet.pdfIn PDF document text
- http://betiwewis.rf.gd/52977464008.pdfIn PDF document text
- https://s3.amazonaws.com/bejenosugede/kesuwase.pdfIn PDF document text
- https://s3.amazonaws.com/bifadiwuwileji/mizop.pdfIn PDF document text
- https://s3.amazonaws.com/divelatoxa/27945450127.pdfIn PDF document text
- https://s3.amazonaws.com/kudefem/30571880432.pdfIn PDF document text
- https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_41355fa1fb754939ac41e9f5672d3aba.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wolawatin/players_handbook._5th_edition_wizards_rpg_team.pdfIn PDF document text
- http://ziwibavufu.rf.gd/speak_your_mind_book.pdfIn PDF document text
- https://s3.amazonaws.com/xifabilejilab/tarzan_of_the_apes_chapter_7_summary.pdfIn PDF document text
- https://s3.amazonaws.com/medaliwifufugel/xozasoluzika.pdfIn PDF document text
- https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_c8c3e22205204e9e90314e468dcd7da6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/biwuwukesazef/68979495267.pdfIn PDF document text
- https://s3.amazonaws.com/xajowu/nuzafepigamevagolu.pdfIn PDF document text
- https://s3.amazonaws.com/wemupajese/25480085783.pdfIn PDF document text
- https://s3.amazonaws.com/wegugus/karcher_pressure_washer_gun_replacement.pdfIn PDF document text
- https://s3.amazonaws.com/jevedijadiki/titupuveseluvifosefexexi.pdfIn PDF document text
- https://s3.amazonaws.com/bamepofewalada/vitamin_d_supplementation_in_adults_guidelines.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_off0000f1ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1EA	5312 bytes
SHA-256: `7ba15f060b84af574d2c0db1b6dade9fa9b26a7f4494f6bd43d6550e10989b08`
`font_01_sfnt_off000103e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103E5	11388 bytes
SHA-256: `4d8e900841caae9f2b495b183015331c8ef19bbe14b97b44a87f4a61592e664b`
`font_02_sfnt_off00012aed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AED	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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