PDF malware analysis — malicious · 0d80d6a04b46df0b

MALICIOUS

PDF

96.3 KB Created: 2021-04-26 01:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 5238150c05d97769d0a4cc4f6d9f7adf SHA-1: 26916ea778e52c2d6525bf4fb903c331caf82fde SHA-256: 0d80d6a04b46df0ba207e3345e69375de7bf538625d6d92f9b9533b8e1b45d2c

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a high-severity heuristic firing for a redirector link, indicating a phishing or free-download lure. The embedded URL points to a suspicious domain, 'vilenefex.ru', which is likely used to host malicious content or redirect to a phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://vilenefex.ru/strik?utm_term=wildgame+innovations+mirage+18+trail+camera PDF link annotation
- https://cdn-cms.f-static.net/uploads/4369138/normal_603ff62b7bb5f.pdfIn PDF document text
- https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/dd4b254.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370266/normal_5fec417b8b30b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485004/normal_6026b7f855236.pdfIn PDF document text
- http://toguvuveleguna.22web.org/31456223552.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377120/normal_5ff9c7812c7b9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465131/normal_604dcfd331e8c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4424007/normal_600345936bf33.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373008/normal_6015d82525aeb.pdfIn PDF document text
- https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/aae7caee11.pdfIn PDF document text
- https://witiderinusoj.weebly.com/uploads/1/3/1/4/131483097/4e5b77eb.pdfIn PDF document text
- https://nenawobu.weebly.com/uploads/1/3/4/1/134131353/cdf59f573f74.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411498/normal_603c1950877c9.pdfIn PDF document text
- https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/9354954.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/xeroguru/fawosefedotix.pdfIn PDF document text
- https://s3.amazonaws.com/wujafivabipo/addition_worksheets_for_grade_3_with_regrouping.pdfIn PDF document text
- http://tutivute.epizy.com/lagu_ashilla_zahrantiara.pdfIn PDF document text
- https://s3.amazonaws.com/xajowu/povifazagepened.pdfIn PDF document text
- https://s3.amazonaws.com/fusopoxipo/87873768187.pdfIn PDF document text
- https://s3.amazonaws.com/marimejerebo/lugopesoroborul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a0f357f7-8612-49ca-9bd4-35797521288f/jemuribetokenilil.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dae7cbb2-5205-45fc-b340-9c574b82e073/57710659736.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7880ee1c-9859-493f-b997-2c8dbc5acd4a/why_does_polar_attract_polar.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9b458cf3-395d-40b4-adec-3d027f5f0494/how_do_you_cook_spaghetti_noodles_in_a_pressure_cooker.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_off00012da6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DA6	5364 bytes
SHA-256: `a02d2924b02bb485117e9b9b30b039ffc0cc78cf624cff9d69d9931b44b057cc`
`font_01_sfnt_off00013fdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13FDF	10984 bytes
SHA-256: `3daf59c2fb53cf57a7feeac9cd995aa265ba3cd9404f8150fa4317b3c8c80445`
`font_02_sfnt_off00016592.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16592	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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