Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56abc6cf4b3da48…

MALICIOUS

PDF

131.5 KB Created: 2021-07-03 02:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c88cd1dffcafd93e27d8ca5315ab28fe SHA-1: d473aa306cc3be34460370f37faa92809fb06188 SHA-256: c56abc6cf4b3da488334191bc703eeeac83bad06dc496bedf1e8a157ba324887
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://kolasinprevoz.rs/slike/files/55216190354.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/33214f461d2b335b900475fdb629d66e/14643093726.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/335d39a488ac0d22cabd2923f3ada265/fevixatuj.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/6921f78fe131ebc6cfdc45f9cb0d0ad0/vomatumipilefipo.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/07a38fdbab4511fc440b467256d6c11b/sonokal.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16099f8f59fd71---vomizowemewizonus.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6e4d16d8c---xevajakulamorepus.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/h2knqhpjulob3955d1hnm6b578/88266455679.pdf
    • http://zae.me/datafiles/file/56985104066.pdf
    • https://yssnewlessons.org/UserFilesTwo/file/29656105654.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbae808dce---mabirurabumu.pdf
    • http://animationcoach.com/userfiles/file/madesomojotigumazoxiju.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/d793ae0cebf62b79a81d0ece67b945ec/59599173698.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b55d97bbdfd---tukowebolukekibos.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9ac61025a---seromejegikesabaxeju.pdf
    • http://sgd42.ru/userfiles/file/94429653003.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8af29045---powubixi.pdf
    • https://feng-shuiworld.com/userfiles/file/13712259267.pdf
    • https://telewebmarketing.com/FCKeditor/file/bigabafamabop.pdf
    • http://www.heksan.com.pl/file/44415922450.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/01623c6a67cb87b0d137342720bfd609/pusizusej.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/fe73f00e3c7fc34d2d70fb0da83b4b67/70238018690.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/l277utgj8hp6tupa1balvej9e5/lixowafan.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921294a4e85---tebipakiluwedebufame.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/gngvncm8095fulef5gpccj0odc/90244556333.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=peter+pan+banishes+tinkerbell
    • 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_off0001a19d.bin
f3e1719fa095b9057cd15dec04d97f526b312d0568d405584fe6246b74f71680		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A19D 18036 bytes
font_01_sfnt_off0001d076.bin
f571680d3b0a79efdf210db92cf19c011c7d36c0b4e8e2148c604a9821d49fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D076 10460 bytes
font_02_sfnt_off0001e7e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E7E1 16792 bytes

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