Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e87d2285bc77af…

MALICIOUS

PDF

91.5 KB Created: 2021-04-18 00:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9370dcf027a0bd98775f9f96efdb9427 SHA-1: 29077069d4b6f58f799240b6536348abea600f06 SHA-256: f3e87d2285bc77afcf45ea2ec087ec585c1af0f4295c18fef3798b1886285f6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to other PDF documents hosted on various platforms. This behavior is indicative of a link farm designed to distribute malicious content or conduct phishing attacks. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/strik?utm_term=tree+of+life+washington+trail
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/1f0fc6.pdf
    • https://bikizulotozenap.weebly.com/uploads/1/3/1/8/131860645/a74a8ff.pdf
    • http://midimox.getenjoyment.net/creepy_short_stories.pdf
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/aed7b.pdf
    • https://sobaxijuxoje.weebly.com/uploads/1/3/4/2/134235367/vitewexefat-repizorora.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_c5bde1d36ded4732b46bda75e04188b8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a06bdf92-4e04-4825-aeeb-be08bf73524f/fugimozanegone.pdf
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_9f6150267e7a4d5390161cce4f60227a.pdf?index=true
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_8e91abad755141fe8d30f343935d3d5c.pdf?index=true
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_56c772b3ec484550b0b7bb0d298d1e57.pdf?index=true
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_f44c38da6dec4847bcd45e06ac3c190f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dde8aa2c-0cda-4629-b7c5-16dfac7a3cfc/73188401915.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8a.bin
3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 6440 bytes
font_01_sfnt_off0000fb7e.bin
1e0ae46dade198393cd7b176c56301b5eb51cc87595b1687782ed3a4f299cc5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7E 4860 bytes
font_02_sfnt_off00010bfc.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFC 1800 bytes
font_03_sfnt_off0001148a.bin
8316ddbcc9660ba5cbaabe9e12e51c2bffeca30bab2c1580b827b7a281d502e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1148A 11612 bytes
font_04_sfnt_off00013c76.bin
de4d8b2f57bd79f1a868fabda613d9936b110e31710edd4728466090b424b6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C76 16340 bytes
font_05_sfnt_off000151ee.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151EE 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.