Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b4e4d7f539467f…

MALICIOUS

PDF

62.8 KB Created: 2021-01-27 08:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ac3b44fdab501bfaa739ccd91adda027 SHA-1: 75f72ed46764fde5318b3e37e870ee4849b49e76 SHA-256: f7b4e4d7f539467f13e1322a607475550273433798f5aa1b2830f3d539373a9c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The embedded URLs and the document's structure point towards an attempt to disguise malicious content under a seemingly legitimate context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://leonvi.ru/123?utm_term=moore+coal+company PDF link annotation
    • https://lubavezutumeji.weebly.com/uploads/1/3/4/7/134757539/tonedosegivobaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497079/normal_5ff7f4a65c2ae.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/RL3XfyX/zombie_age_3_hack_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408170/normal_5feb101ed5e68.pdfIn PDF document text
    • http://tersq.fun/awm_gun_sound_message_tone_download6ntaf.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/jiAibSb/song_quizzes_quotev.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/hC4gdih/nijofuduxil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5ff34ff3f0b48.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/gunilaz-jelirigujif.pdfIn PDF document text
    • https://zujetopefij.weebly.com/uploads/1/3/4/7/134766602/newonof.pdfIn PDF document text
    • http://helpforteam.com/learn_php_html_cssf1pc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447914/normal_5fe531f589c2a.pdfIn PDF document text
    • http://onlyforyou.space/rope_frog_ninja_hero_hack_android_17ku9h.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/dWgfsjg/resident_evil_movie_reboot_2020.pdfIn PDF document text
    • http://italylife.pro/38331173370ex48p.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/269e153143c0392.pdfIn PDF document text
    • https://dawasaga.weebly.com/uploads/1/3/0/9/130969366/c58bb5b75.pdfIn PDF document text
    • https://lasuzolus.weebly.com/uploads/1/3/5/3/135315371/2549360.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBD 5008 bytes
SHA-256: d07e9bd6c1602b00a4c059e5d8ca785a71862f65b1501b8e8ceb8727fb1958df
font_01_sfnt_off0000cdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC2 9528 bytes
SHA-256: 2383c0bc8ecceb9aa9d7a069fd97e35c36fb9c60115bd8a9e81407d75c8d80d0

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