Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba863107d38078e8…

MALICIOUS

PDF

93.0 KB Created: 2021-09-05 04:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 997a1a12b6ea2f17800533697e658c52 SHA-1: 2b7db9dae7768f3b554dfd0eccc7f19a7775ca59 SHA-256: ba863107d38078e85e5877818d65add98a3cf916cb143d3d7d777b6c9c47723b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of numerous external links strongly supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://imi.vc/upload/files/monibonezigorajabazad.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/1eff5eb0a699422b2a73dbadc6e0a7b0/jezuka.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa4fb43721---sinegudurado.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/b749a388c40dcbcabef0dd4be0b90cbc/24759493019.pdf
    • http://email-database.info/userfiles/file/gogamepufakila.pdf
    • https://aedwea.com/upload/foto/vigonidiresaz.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dbd81daf5---jidepepavozaviwuk.pdf
    • http://vizcsap.hu/files/file/radetojisuto.pdf
    • https://ilmercatinosottocasa.com/file/87869482452.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610105b63041b---xivewuvodejib.pdf
    • https://gad-elhak.com/userfiles/file/71959721564.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073b1d12414b---28459123656.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ae298d57c29568d29a0cb0db492f00db/71249484126.pdf
    • http://www.cpiequipos.com/assets/images/user_files/files/mepetitinimabulegilevut.pdf
    • http://bronia.org/userfiles/file/pumowiniwitigevewiviz.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/dezer.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16089f8a9f1986---83671132054.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606d22193a9a2---65807054865.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4143dff4ddde2ce0be1001e914d8f9d/84995085378.pdf
    • http://abwva.com/uploads/files/bometa.pdf
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/kaputuz.pdf
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/zofijegobujo.pdf
    • http://mgocsm.in/userfiles/file/vajex.pdf
    • http://sys-svinding.dk/userfiles/file/jupixudatorosujex.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=viessmann+vitodens+200+manual
    • 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_off000103bf.bin
606190c6b9f5f2333df220d8675455c834fe5dd96c31d736c02f509a02c42923
pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 19112 bytes
font_01_sfnt_off000135d6.bin
991f3c2118d1594e57ecddb5ddc8bc8d53e0987e24e3fed8678f3fa6ea0da367
pdf-font-stream PDF embedded font (sfnt) at offset 0x135D6 10684 bytes
font_02_sfnt_off00014e6b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6B 16792 bytes