Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e33831feb453b6…

MALICIOUS

PDF

88.1 KB Created: 2021-03-25 14:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f73f6c4012065d530eefb70db97da1cd SHA-1: de2b9aba909589c3e8ac2101c18fe50c39190d34 SHA-256: 30e33831feb453b659b6b5692afaa38a5131aecc48349dfd7a56035c6a2d31d5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many hosted on Weebly and CDN domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate that the document's primary purpose is to drive traffic to these external sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/123?utm_term=kathi+audio+songs++tamil
    • https://sagejajake.weebly.com/uploads/1/3/5/3/135303377/badasinuga.pdf
    • https://rubavuwo.weebly.com/uploads/1/3/4/4/134403239/nufoma_josuguxulizedo_fijirolabexukow_majup.pdf
    • https://tudegikugil.weebly.com/uploads/1/3/5/3/135317618/051ed64.pdf
    • https://likunemotiro.weebly.com/uploads/1/3/5/2/135299998/vemimov-zutukebax.pdf
    • http://zukirudon.mypressonline.com/89494501875.pdf
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdf
    • https://cdn.sqhk.co/temirikuji/jeji1rg/arcade_games_for_sale_skee_ball.pdf
    • https://cdn.sqhk.co/moturalogupe/Nljeb8X/wood_block_puzzle_game_2020.pdf
    • https://vogadebu.weebly.com/uploads/1/3/4/7/134723944/f64d1add.pdf
    • https://cdn.sqhk.co/fepexeguma/jeL8Qjh/79040457397.pdf
    • http://gajaxujifusokul.mygamesonline.org/lunim.pdf
    • https://bujubupe.weebly.com/uploads/1/3/1/4/131437121/viladojozipo.pdf
    • https://cdn.sqhk.co/zisujidixa/gjejibT/synesthesia_music_emotion.pdf
    • https://jajipovel.weebly.com/uploads/1/3/4/5/134527293/7316064.pdf
    • https://cdn.sqhk.co/kefekawit/ihbggTk/25976967969.pdf
    • https://cdn.sqhk.co/nupegefozub/jdageLe/download_4fun_app_get_more_status_video.pdf
    • https://kolapudavuvoxe.weebly.com/uploads/1/3/4/3/134315715/ac7d02.pdf
    • https://bujajegufo.weebly.com/uploads/1/3/4/1/134108800/tobegofulixosepol.pdf
    • https://cdn.sqhk.co/fuvebopeweb/gxGidCO/43145788299.pdf
    • http://fuwijumazawad.mywebcommunity.org/star_wars_rebels_ahsoka_wiki.pdf
    • https://cdn.sqhk.co/dakagugi/hhcrz1d/xexizabedigejagiraba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_bf377dc995504d4db5925bd4fecfa0e5.pdf?index=true
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_5692d6d15e66428cbbcd02f307409d40.pdf?index=true
    • http://filosoko.onlinewebshop.net/14847111249.pdf
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_9fe39f48e80e4f389cf3422446151c2a.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_off00011d9a.bin
23dfaf313fd129b9a16021992eb5a9ef60834e53311d814598576753ecefff00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9A 5112 bytes
font_01_sfnt_off00012ee1.bin
9f4a0e4e1bd0e5bb3b158082a8e75c3d12d6c11d4dafcf87f71a8339bc4ec637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE1 10936 bytes

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