Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ba3b1763e3b327…

MALICIOUS

PDF

75.5 KB Created: 2021-06-27 10:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75c546ce64c8658e89acaa272d0cbf1b SHA-1: 06839f16d914ff8f6afc35bca3b92943041cebb7 SHA-256: 32ba3b1763e3b3277966b991e2ded77413561bf4805b68e0d84ef802d9995c94
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, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/31a2d0286162e135f9580aa41f93b478/17122954364.pdf
    • https://liniagdanskzydowo.pl/files/32356568081.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a4eecb1bab7---83916056935.pdf
    • http://sunjewelsonline.com/userfiles/file/76301460170.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608864f167a68---87912043759.pdf
    • http://mmdplus.com/userfiles/files/20210606_015820.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/14818181116.pdf
    • http://markone-tools.com/upload/files/56322614676.pdf
    • http://studionegro.net/userfiles/files/tawisodifejajaxutivi.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083db710d935---54946328769.pdf
    • http://beiwendq.com//data/attachment/file/josefadipidijafuxixatulej.pdf
    • http://boeschfamilytravels.com/clients/43210/File/84507473437.pdf
    • http://18554080.com/userfiles/file/43473130204.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/b4thhip76jtuo7iqpo4o4t76cp/39627117592.pdf
    • https://liur-krd.ru/userfiles/file/99183971947.pdf
    • https://tortugafilms.ca/adminfiles/file/2040146460.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8598a8120e---31738465817.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c04891008ff---vitazebifatabu.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1023d20aef---79498353806.pdf
    • http://constantemail.com/userfiles/file/1623767452fazepom.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083873962a83---mekifikup.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a57f1d7c1---22744741807.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1f0f00f7d49fc1128bdb4c6fecfe5f21/lezazasejur.pdf
    • https://dakhoathienhoa.net/images/files/53856874123.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=bentley+continental+flying+spur+owners+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_off0000c400.bin
7855c381828e46956e106fedad4803aa0b0f60b9c723935ffe25f025db84c369
pdf-font-stream PDF embedded font (sfnt) at offset 0xC400 16240 bytes
font_01_sfnt_off0000ee12.bin
d02cd1408e1b159a335674a729689533e2cf619ed38be1d4c40783fb3de2e678
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 11176 bytes
font_02_sfnt_off0001085b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 16792 bytes