PDF malware analysis — malicious · 2984e1ed0bac092e

MALICIOUS

PDF

80.8 KB Created: 2021-03-16 04:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 1a11b802b764b4d39f8911baf4eb2770 SHA-1: a92626b7c5f8f99b5d5b2f53dd60814e381d1d91 SHA-256: 2984e1ed0bac092e38b9c88ecae5b0d9afc6101ba4482d1b9a2c81c3d4e75daf

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are SEO-redirectors, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point to a strategy of distributing malicious content or phishing pages through a large number of links.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://dugedepap.ru/123?utm_term=basel+committee+aml+guidelines PDF link annotation
- https://cdn-cms.f-static.net/uploads/4415051/normal_600db1adbed83.pdfIn PDF document text
- https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/460497.pdfIn PDF document text
- http://modezewop.mygamesonline.org/do_gas_water_heaters_have_a_pilot_light.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4490371/normal_5fe055589af0b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465703/normal_602d732ca6b52.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419628/normal_60492285ee841.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4405930/normal_5ff83b77391db.pdfIn PDF document text
- http://vivudanu.scienceontheweb.net/86270037430.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4419827/normal_5fe29ec33d21c.pdfIn PDF document text
- https://mufebomilizupa.weebly.com/uploads/1/3/4/6/134608191/jejebe.pdfIn PDF document text
- https://fuvepuzineg.weebly.com/uploads/1/3/4/4/134463404/mumumivega-pedaxabix.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/vapite/decking_sheet_uses.pdfIn PDF document text
- https://s3.amazonaws.com/gavexilatuvitaz/g_shock_gw_9400_review.pdfIn PDF document text
- https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_599f9a62df1d4879b0034eb6e4cd09d2.pdf?index=trueIn PDF document text
- https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_65d4cc328d1d4b9389df3aa6c000e38c.pdf?index=trueIn PDF document text
- https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_209794f27a394dcc827ba016324e09cf.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/legapatatezisa/what_is_the_best_nlt_bible.pdfIn PDF document text
- https://s3.amazonaws.com/sugowubuf/57542753812.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_off0000f34e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF34E	5096 bytes
SHA-256: `36c5f31da1a367c1048b2d4843de875ac5c2d3e401f8798ab09c3e18d3e634db`
`font_01_sfnt_off00010483.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10483	10436 bytes
SHA-256: `153c0082e17c9d7779d03a337950b973539e1216fc4afdfed12a222b6f7ccf15`
`font_02_sfnt_off00012822.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12822	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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