PDF malware analysis — malicious · 551314d14e38fdd6

MALICIOUS

PDF

75.5 KB Created: 2021-02-25 17:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d50371dfe8bfe73a7e86cc81003cd9c3 SHA-1: 7b442eb63e2739ff9b02847e4e14a66dec3321d2 SHA-256: 551314d14e38fdd632a3efe2ffd47696eb6c14f409e5466f4bcd1847caa9ee83

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users. ClamAV and ML heuristics confirm this, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URLs indicate a likely attempt to lead users to malicious or SEO-manipulated content, possibly as a phishing lure or to distribute further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://maypoin.ru/wix?keyword=airlines+manager+tycoon+cheats+iphone
- https://cdn.sqhk.co/marixefe/ghhihGh/maplestory_dark_knight_mobbing.pdf
- https://cdn.sqhk.co/jivapereb/ighjcjj/slice_and_dice_wow_classic_addon.pdf
- https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/wimoxadejevor.pdf
- http://noxesim.iblogger.org/informal_letter_writing_samples_for_class_5.pdf
- http://xafukuxovikovu.22web.org/citation_sample_apa_format.pdf
- http://kofoxulemaxabur.22web.org/vutuzuvatadij.pdf
- https://cdn.sqhk.co/siloneza/ajaJbxN/tolipegugefewixewupikud.pdf
- http://bakanoloxekiwub.iblogger.org/yahoo_weather_apk.pdf
- https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/xeguto.pdf
- https://cdn.sqhk.co/dijabidasu/i5higiP/the_farmhouse_nj_wedding_cost.pdf
- https://cdn.sqhk.co/sururezog/iNtgghb/vemosoxojimasovulelaz.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://piwodapasolok.rf.gd/16141697553.pdf
- http://dewiwunitut.epizy.com/33681670848.pdf
- http://sajojabop.epizy.com/43566959163.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_off0000df73.bin` `2d8551afcf60a4238d533dd4126630e0c807dff43a42d904b39455e418fdd2ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF73	5440 bytes
`font_01_sfnt_off0000f1ce.bin` `2248dfc48278f1a2a2686ac8e096b5e5c1415d2dbeb82f05e336c72ac09643b9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1CE	15292 bytes

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