Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90ff137c2a7dde1…

MALICIOUS

PDF

87.5 KB Created: 2021-07-13 02:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: deee6ab0ec5b7406926d0a467fb9bdcc SHA-1: 6f8e38c4cc922aeef7450b34cb6ba850f79a080d SHA-256: d90ff137c2a7dde1d7f11c3bda9605f16ed4d0e9a2ca1226f5e2a2cfb7d08001
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content. The presence of a callback lure heuristic suggests a potential phishing or tech-support scam pretext. ClamAV detection and ML classification strongly indicate malicious intent, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=essentials+of+business+information+systems+pdf PDF link annotation
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160756df5c4936---70392724991.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abbdc2d6e1d---tekedopepej.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787f07c3957---pojuwunupanelam.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/96655748774.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/6498707297.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/88231243473.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160721c0bc598e---risumijifurewew.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/81308843421.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/l4r94nn50r5qie78kerluoepoq/22494615277.pdfIn PDF document text
    • http://weddingceremoniesbybev.com/clients/72651/File/zojolimomodabu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077378f76908---50489683632.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/dafiloxakivake.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/jidadifapusafupomod.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831b3399ca0---vasuka.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/mejijetelerenujukumubewor.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ecgt4rh6v1bsf1id2akeo714r7/80627358527.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/ehjvvn91ucrjic337e5fdv2gjr/gifonepesokoxopoxekuvax.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/742f426af06fb74fd1105384ec504480/vagomijilupedameralalira.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d556bc4c3ca---wupitafoluwid.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed1251c7f5---28765792460.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/87887096757.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/nuxaribam.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e02978df5e5---11824582402.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/u9u0lqk1j77ndjqko495ep3npe/88405142473.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/wizideved.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 16484 bytes
SHA-256: 369aaefde11d35720718dd03646c6102e0205c41b52465bd8ec23f38c0b95190
font_01_sfnt_off00011eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB2 10996 bytes
SHA-256: 41695c1b6691c0098a32f3f1c934bb3b7b77ac6e949e4c512d1d5948f090c588
font_02_sfnt_off0001380f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.