Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60aedff44a839a5…

MALICIOUS

PDF

78.4 KB Created: 2021-07-15 20:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5763c34984c0721d15a44a8ac7d85f4b SHA-1: 62bc600ebd8d0c4f7cc5e8d8f43a88c1e2c51901 SHA-256: b60aedff44a839a5a11efdc2776d2eba5e56e8244cd6c314c2eb183e311c2092
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of multiple external URLs points to a common tactic for delivering malicious payloads or harvesting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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://garglob.ru/uplcv?utm_term=convert+mid+to+mp3
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a8a89cc08ef---94865082557.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/tn1p88nbncv6780dr7lb7smg77/33300121425.pdf
    • http://sevimticaret.net/userfiles/file/tusazaxi.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab20260678---basusepezeresepubugugap.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607317b6afc6a---pulojoziz.pdf
    • http://arslanemlak.come/file/66573303499.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a0354001194---guzuxawokafoganudom.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5ucg62bj267uftiakpuiu8gpt7/87400519676.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9fe4b1d6d---47409613297.pdf
    • https://a2designbg.com/userfiles/file/5145063831.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0417e61965---70408185230.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/jbch2q9tbikdqollb0btg4tg92/61945442298.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/d2fe9hjhlcthc77vs031q4r2ln/3162024017.pdf
    • http://ketnoikienthuc.com/upload/files/kogugesan.pdf
    • http://pho32shabu.com/uploads/files/15631955230.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/dc38eb7dd83481f32accbd359ba2a7e4/rewik.pdf
    • https://watertorens.nluserfiles/file/36284411466.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/741cf6d7f12f2fe93d7b08a898914b15/58088878443.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f84e53eef---xejomiduduvawivaritodabu.pdf
    • https://al-farh-iq.com/upload/userfiles/file/kegebikupakateki.pdf
    • http://thedewakohchang.com/image/upload/File/amezifixizokeri.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083d58bbff3c---85054164870.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3abda5aa7---xuzupiguwemejupanaxeku.pdf
    • http://beveragesgs.com/userfiles/file/rafor.pdf
    • http://capmar.eu/userfiles/file/13582214642.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/fa6a525cfdf592fe4a829cf4a4280be9/nifebabuziwujos.pdf
    • http://amuseonline.com/absite/userfiles/file/wower.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://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_off0000d1d3.bin
b7b3151765d7d89ac8c05e4795b8ead115d1c19c9dfda39463fcf56dfe5c548c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D3 10448 bytes
font_01_sfnt_off0000e984.bin
a61f8b995974ec6994843ab0ff155294d86268ef451ebd056fcc1aadde14e6b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 16540 bytes
font_02_sfnt_off00011418.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11418 16792 bytes

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