Malicious PDF — malware analysis report

Static analysis result for SHA-256 896973d647e62dc0…

MALICIOUS

PDF

86.4 KB Created: 2021-06-25 21:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b37d41fb96c3384e2ddae42b52bec05 SHA-1: c58aa55ce29e0899c243e649416ac118a99198be SHA-256: 896973d647e62dc08c3af8dac6b28ee3ded00067fe136c6d5da0e1a48fe7096c
276 Risk Score

Malware Insights

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

The PDF contains social engineering lures consistent with advance-fee scams and ClickFix attacks, instructing the user to copy and paste commands into a shell. This strongly suggests an attempt to bypass macro restrictions and execute a malicious payload. The presence of multiple URLs pointing to compromised WordPress sites and disposable hosting further supports a malicious intent, likely for hosting secondary stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16075f59097921---simisukanuviwubuxewolad.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a72e1dd8d---vofuvedunusitedavulo.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/20f456573beede88282c52a6ee87a521/batadelupirezo.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074f977492bc---10230667462.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/u9ptevp1cnoqmmos526qv26jgv556te1/rivaximuvena.pdf
    • http://zulassung4you.de/bilder/file/kataxogarade.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082ddf425dd2---75952361929.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d895fb2230---tuwetuwafovitepepasup.pdf
    • http://aklond.com/UploadFilesfile///2021052315492826.pdf
    • http://coffee33.ru/archive/file/18466340985.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/c0d428348feb2aed126c21c8c242096d/44178958563.pdf
    • https://ceral.pl/ceral/pliki/file/57013292887.pdf
    • http://anthonyvienna.com/sites/default/files/file/64831722261.pdf
    • http://progfin.pl/userfiles/file/67918309449.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e5ab5321e---kavorurobogagubor.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608428f9074c9---makumakofezesuv.pdf
    • http://skolicka.eu/foto/images/file/63634643144.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a118b960af9---85241858537.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/855emmjhn69pjn64m735m39gbr/kolixod.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=change+pdf+to+read+only
    • 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_off0000ebe9.bin
faa453b4a51660b9bbe2879c42ec08686a39b18949c6b338e9f60cadbba88939
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE9 10664 bytes
font_01_sfnt_off0001041c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1041C 16792 bytes
font_02_sfnt_off00011c2e.bin
a5609c371c92abdb24c75a53325722d91b53af08c227ed6d7d4bed80dba66949
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2E 18552 bytes