Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbfdc0657e7a918…

MALICIOUS

PDF

82.9 KB Created: 2021-09-03 01:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64ec7a3b30817a528e548ba48f5fa2b9 SHA-1: 9c6508e2e8061d71c6e87af943fb61fac86d8896 SHA-256: 0dbfdc0657e7a91854bcab8a2f5eae29d6df8bd79ac388e1e08684cb68330f07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly indicate this PDF is malicious, likely serving as a lure for phishing or malware distribution. The embedded URLs and the nature of the link farm heuristics point towards an attempt to distribute further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607788980ac44---47233618308.pdf
    • http://vindindex.nl/images/uploads/16485435057.pdf
    • http://sys-svinding.dk/userfiles/file/lafimo.pdf
    • https://cv-vezouze.fr/media/file/3246829398.pdf
    • https://sklep-pinokio.pl/web/uploads/files/73548328221.pdf
    • https://ebdaatcoop.com/userfiles/files/11234301194.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16118f037d9f1c---paxasudovexumem.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160758565a055f---57797035690.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071998424dc3---gerigebufupobiwutateze.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf3583f26a---suwetiwu.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1facb4993---71805349719.pdf
    • http://contrast.no/ckfinder/userfiles/files/66545954928.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/1mv52mkhccerjbuc425no8ostk/vevimanagasovunesiselupi.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/nc93jro27nm4bk97g1up6tur05/zewadupedivabu.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/0feb9731b97f6974a2720cc7b86a905b/52404599402.pdf
    • http://roleco.pl/data/aktualnosci_imgs/file/1449757619.pdf
    • http://vstarmp.cn/upload/files/20210617_192357.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/da7b934e2ceddcbca419b8fe35d9dca5/mikijege.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160757a5aaff34---kafopoki.pdf
    • http://gocchame.vn/app/webroot/img/uploads/files/buwipu.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/12396be5d5170ee4dc1962c44566d216/28900704941.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//87870998741.pdf
    • https://debcopharma.com/userfiles/file/budupumulegotapako.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b282dbc1004---koxixerolanam.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0iqa4vbgmlav7adp9936atvg3s/95500305117.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ideology+and+ideological+state+apparatuses+louis+althusser+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_off0000dd8a.bin
1be59a39da9d1ca5bf60a08e1e13dba7ba47195c5004a82a218a38182801c4d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 17968 bytes
font_01_sfnt_off00010b7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 16792 bytes
font_02_sfnt_off00012391.bin
8c4b53fb3682fad862d4a0362c981666978764ab323a2d14e0da97ce86c91960
pdf-font-stream PDF embedded font (sfnt) at offset 0x12391 11064 bytes