Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2fc0d9edc56b5a2…

MALICIOUS

PDF

81.8 KB Created: 2021-07-10 06:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf2234293462d83969a5c6388bbcce82 SHA-1: aa98ecc1de72d2e39dfb8b2a3cb67055124b8025 SHA-256: a2fc0d9edc56b5a2ce796bfc1f1070824aaee5e4976c105628274c2fea9b4de0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to lure users into visiting potentially harmful sites, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ss3gua1707q88cotnmt5754jt3/49494185656.pdf
    • http://drukarnia-skawina.pl/app/webroot/media/files/bozapulodapirapuwup.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/2715255c39d9eb75cb74aecd44b926ca/88726654250.pdf
    • https://agrimal.pl/userfiles/file/dirotesebuzivenumutuxew.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/84k85npcuppmn0dvcpuccpo95g/xabikasuwuvijegaj.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/b0a23569225232b327e317a57b479101/rilibubitiwer.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/glns68g50c8ikrhmfp9caf2vvu/7124358566.pdf
    • http://www.awakohchang.com/image/upload/File/5314851348.pdf
    • http://papinchess.ru/userfiles/file/15878186541.pdf
    • https://soalmatematik.com/userfiles/file/sexaxusus.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c85899bed6a---zedekikizixepiximugebokuv.pdf
    • https://spiuruguay.com/ckfinder/userfiles/files/luvizitisenemofatet.pdf
    • http://bephoangdung.vn/uploads/ckfinder/files/tuzibolus.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/58b185bf1f93cd8bfcbb3ce07585ac86/xaxaledifamesovomoji.pdf
    • http://scoutpate.com/userfiles/file/53453980762.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6118ef666---koxofemuxidibim.pdf
    • http://championsview.net/userimages/roxofekibetesi.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfd342d83---girerudelubevibo.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/d44e6858a5a7b69d348405b46517e2aa/98509214290.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797ff1a3cf2---deseti.pdf
    • https://al-farh-iq.com/upload/userfiles/file/56008100215.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e56cb42deb4---14684312112.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894f6b09970---68786942315.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071acf941155---baletavuxepu.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160737c5448b76---26633113702.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=cryptogram+puzzles+with+answers
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1d.bin
24a832adf9ec7982afe6778c6624f978bdda67c534890118a21391175139655c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1D 16456 bytes
font_01_sfnt_off000107a2.bin
2b58cb00f437fe314527ba9e605fb4e7d14a828070e578adfadad8d648ffc456		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 11092 bytes
font_02_sfnt_off00012172.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12172 16792 bytes

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