PDF malware analysis — malicious · cb97680442da75e3

MALICIOUS

PDF

71.2 KB Created: 2021-03-24 23:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 82605b8bfd2958890a8da40634d9ac1e SHA-1: 4b5817dff23fe00be1bdb3d4af5798e21a5126b6 SHA-256: cb97680442da75e3a25f57e9840a5b6aa0927d50ea45c72a1e1d75fd03c96b3b

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, many pointing to disposable hosting, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URL `https://botokokaw.ru/123?utm_term=appaji+kannada+audio+songs` and the link farm URLs like `http://ronarag.epizy.com/42634135803.pdf` are the primary indicators of this malicious activity.

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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/123?utm_term=appaji+kannada+audio+songs PDF link annotation
- https://ludajajuxo.weebly.com/uploads/1/3/5/2/135293479/rolovikiviwen.pdfIn PDF document text
- https://pakurematumomu.weebly.com/uploads/1/3/4/7/134764434/f1ace12ac.pdfIn PDF document text
- https://cdn.sqhk.co/zoxinugokas/jhggXHj/army_border_wallpaper_hd.pdfIn PDF document text
- https://cdn.sqhk.co/duxadikoti/Jgihgge/vuwifumiripojorezib.pdfIn PDF document text
- http://xomofaki.getenjoyment.net/55748290221.pdfIn PDF document text
- http://ketaton.mywebcommunity.org/33464381086.pdfIn PDF document text
- https://pejejuwefosewa.weebly.com/uploads/1/3/4/0/134040570/e0b0d63897337c5.pdfIn PDF document text
- https://cdn.sqhk.co/vasibejovej/i60GifX/cat_open_mouth_breathing_while_purring.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- http://ronarag.epizy.com/42634135803.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0ab4f386-b2db-4fcd-a464-9a454fd0c1e8/how_do_you_reset_a_jabra_charging_case.pdfIn PDF document text
- http://karifopiti.epizy.com/pixef.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f3d73e13-df93-459d-a674-b240b0952427/vejexol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/df68bb17-06fd-4463-a807-0b6b315b6f5c/sony_cyber-shot_rx100_iv_price_in_malaysia.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8dc0dc95-1f66-45e5-8c61-2da06a260838/widoluvuxedomojivata.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/41f7d689-ebe1-4d67-ae15-474af2587009/how_to_record_dividend_expense.pdfIn PDF document text
- http://bevetobepo.rf.gd/what_states_do_palmetto_bugs_live_in.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f462d726-c72d-4cea-a43c-758e010b4a48/old_york_furnace_models.pdfIn PDF document text
- http://limixawur.rf.gd/what_is_my_perfect_diet_quiz.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_off0000cacf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCACF	5128 bytes
SHA-256: `8f443ccfc3d1ea87d3265e934d9849193959bcfc012cd3f4e4ce0b6d11b1cd7e`
`font_01_sfnt_off0000dc5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC5D	3272 bytes
SHA-256: `41fb46360cd87adea92b74c77ca68a4b1e83f1822c18676c1c18a8dd0f86733e`
`font_02_sfnt_off0000e969.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE969	10964 bytes
SHA-256: `3d99d2cd20d1f3e753e168d50de49a421bd8b28e4dceb490c05d4a124f01ba2d`

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