Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f497722e96a2364…

MALICIOUS

PDF

82.7 KB Created: 2021-03-30 02:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ad1187c069f9cb83026d8803365b8ac SHA-1: 2ad18315e2649bd3d926adaf5d5951a92cf21bc8 SHA-256: 5f497722e96a23646f9d9334aa78947183e97a820fcb66dba641875945db4098
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to host malicious content or phishing pages. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, and the presence of 'Pdf.Phishing.Trojan' in the ClamAV detection strongly suggests a phishing or malware distribution intent. The embedded URL and the document body, though obfuscated, hint at a lure related to 'game tools apk'.

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://xezojetit.ru/wix?keyword=game+tools+root+apk
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • https://cdn.sqhk.co/xaloxezajaga/qgiiahf/original_clue_board_game_weapons.pdf
    • http://reliables.ru/artemis_fowl_the_time_paradox_weeblyjr8jz.pdf
    • https://cdn.sqhk.co/pepupiribojo/hiQF6ie/92414087685.pdf
    • http://pe50off.info/lost_some_songs_on_itunes4afq1.pdf
    • http://g2am2e.xyz/pobadovemilo1bw9f.pdf
    • http://roskycnmx.com/jiffy_lube_oil_change_time5gael.pdf
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/pojafabojiz.pdf
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/7f2d8e9e2290f.pdf
    • https://rekinijibir.weebly.com/uploads/1/3/2/3/132302710/4743191.pdf
    • https://rutepoger.weebly.com/uploads/1/3/4/5/134509459/dupesibuf.pdf
    • http://defexol.22web.org/punagifopap.pdf
    • http://gumelup.iblogger.org/autograph_songs_telugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mizeteb/sword_art_online_light_novel_volume_16_download.pdf
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_cab13c6895e14caa8d6bae5d01751138.pdf?index=true
    • https://s3.amazonaws.com/nemafu/flat_belly_diet_cookbook_free.pdf
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_076d3554908844b6b90d60c0f243082c.pdf?index=true
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_65fde62c6e724c559248fef74a9c9ec3.pdf?index=true
    • https://s3.amazonaws.com/loranoduzuja/ipu_admission_form_for_b_tech.pdf
    • https://fefcf4f0-bf52-4086-adb3-b788df03f7bd.filesusr.com/ugd/da9d4c_f37c8521bf5f4e6b943be5dfbb646ae6.pdf?index=true
    • https://s3.amazonaws.com/zamemigojat/yoga_mudrasana_in_hindi.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.

FilenameKindSourceSize
font_00_sfnt_off00010533.bin
2324c595535905feeaaac639996b5b2f06ac1a84fd1679a36e2475bc1564388d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10533 5060 bytes
font_01_sfnt_off00011655.bin
630d9a0f2c3b3827e96f0642307355a95cdcfeb1bba4d14159798c653ca2b424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11655 11524 bytes

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