PDF malware analysis — malicious · 5d67175325eaf5c2

MALICIOUS

PDF

68.5 KB Created: 2021-02-26 02:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6414304b0260fcb846f4bf4aa543b4a3 SHA-1: 2cccf2e1ba9410be4bd14c5a4693d27809392346 SHA-256: 5d67175325eaf5c28c7b6e2dcf5a37ca170d810d074f8ea970d0bd08df6077bc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one specifically mimicking a search result for a product manual. This heuristic, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect the user to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

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.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://jacksth.ru/wix?keyword=aprilaire+4655+manual+humidistat+home+depot
- http://dreabling.online/how_to_process_sunflower_seeds_into_oilqt9sp.pdf
- https://fepapidatimupiv.weebly.com/uploads/1/3/1/4/131437812/jojiju.pdf
- https://karomigotel.weebly.com/uploads/1/3/5/9/135962203/5124bd9161.pdf
- https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/lukinanefefim-tidugeba-zamip-penewevimumemaw.pdf
- http://50offshop.pro/challenging_beliefs_worksheet_on_intimacyyp69d.pdf
- http://strgb2.ru/sixanadexemafofewizafupqdghy.pdf
- https://cdn-cms.f-static.net/uploads/4466165/normal_603836308fb80.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/lowebemuwojiso/al_tax_exemption_form.pdf
- https://s3.amazonaws.com/xaliwalufoguni/cbr_file_reader_android.pdf
- https://s3.amazonaws.com/mizeteb/pubat.pdf
- http://renenubulasuf.rf.gd/surf_report_north_shore_oahu_hawaii.pdf
- https://s3.amazonaws.com/rodakarugupoko/famous_guitar_songs_sheet_music.pdf
- http://nutenumiguvivek.rf.gd/colour_blindness_test_book_free.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d02c.bin` `2a2b34d572ee36d65e5150598c845da35c8b8a24c67c8761947b61061fe4236c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD02C	5552 bytes
`font_01_sfnt_off0000e2ec.bin` `a54a14d749cd60b3ba1ca18397a874063b8861360cdd57359de2875128b56ca8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2EC	10060 bytes

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