Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ef46f330ccf909…

MALICIOUS

PDF

100.4 KB Created: 2021-03-30 07:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2fb3b1a5d673fb1542b928c5cae6eb8 SHA-1: 24309aeffdb3896d093505113711325af9394677 SHA-256: 99ef46f330ccf909766d0a47ba8c5e4ff889e8875242967bb8f78a00a653b0cd
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 files, indicating a link farm or SEO manipulation tactic. The primary URL, https://xezojetit.ru/wix?keyword=bad+dog%2527s+immersive+creatures+se, suggests a lure to a malicious site. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

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-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=bad+dog%2527s+immersive+creatures+se
    • https://cdn.sqhk.co/moturalogupe/NjvHWjj/41240960329.pdf
    • https://cdn.sqhk.co/nivatasob/jiiihLu/get_toca_mini_for_free.pdf
    • https://dolunejasuvufa.weebly.com/uploads/1/3/0/7/130776008/1694e4c4.pdf
    • https://cdn.sqhk.co/zuxosutuku/gnjefDj/vopepinibigoxasewor.pdf
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/9675127.pdf
    • https://cdn.sqhk.co/doparibi/ohbkicE/94882661081.pdf
    • https://cdn.sqhk.co/wujejelot/detvjhQ/worship_songs_2020_elevation.pdf
    • http://supariwepexafat.mywebcommunity.org/pefubufogotanetejuvutusi.pdf
    • https://cdn.sqhk.co/kuzaxepigi/ejeWCr1/58928508894.pdf
    • https://cdn.sqhk.co/wejagamewo/bifJgM8/restaurant_story_hack_mod.pdf
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/piwewilez_nobaxiveguze_burevodedog_niborox.pdf
    • http://moxawunanenubop.sportsontheweb.net/four_distinctive_characteristics_of_services_marketing.pdf
    • https://cdn.sqhk.co/vowogada/hcrzjdx/ionity_panasonic_hair_dryer.pdf
    • https://cdn.sqhk.co/luwesefizi/hhebHji/mojizuvudegubawowonojuxux.pdf
    • https://cdn.sqhk.co/romilononove/fxmU6L4/4_pics_one_word_game_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_6d255d5289344c36903b4126928db168.pdf?index=true
    • https://s3.amazonaws.com/gopifu/windows_10_recovery_boot_usb.pdf
    • https://s3.amazonaws.com/xisakazelelinim/centrifugal_pump_troubleshooting_guide.pdf
    • http://nununad.myartsonline.com/diu_mirena_bula.pdf
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_38b472b487dd49429a0a7f955942bb22.pdf?index=true
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_1a957165467d4b5d882a9e792050f83c.pdf?index=true
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_ad4a3ab7799142409b1434aacb37ae42.pdf?index=true
    • https://s3.amazonaws.com/tarizirefevifab/51893461645.pdf
    • https://s3.amazonaws.com/bipepezuwed/48112082062.pdf
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_910f5a04e7bf4012a8378f5ed4088166.pdf?index=true
    • 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_off00014109.bin
ab3e01d25c5781d547dc77523e10da4e3f10d648ee5c20309b77068c20900c34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14109 5368 bytes
font_01_sfnt_off00015346.bin
c08a3ec1b1ddd6e5043d9a1dae2adaf840784b2a2242526a8e33940a800de858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15346 15428 bytes

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