Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f9f0f7ebad05df…

MALICIOUS

PDF

374.2 KB Created: 2021-06-29 07:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9c31a1956e7c34d514dcf299ca237a6 SHA-1: 50ed2a1c677c3cf3574cab846782949215b74a7c SHA-256: 45f9f0f7ebad05dfaf2e081465b38edb803133bae9c15027c3e30b11d6ec6b9f
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, including an ML classifier and a specific rule for advance-fee scam lures. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a phishing or scam campaign. While no scripts were explicitly extracted, the nature of the links and the scam lure indicate a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9792

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.look4job.gr/images/_user_na/file/31249137537.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16092289021424---baxufiwalunu.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/1a35c92c5ec9417beb00ee66e2140d1c/69949992805.pdf
    • https://matfplayer.com/calisma2/files/uploads/muxararaj.pdf
    • https://kanat.com/upload/ckfinder/files/64283106926.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9790ab60c---bitusisimiku.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf05bf5773b---garijekupidobo.pdf
    • http://tzoetemondje.be/uploads/files/puvabadu.pdf
    • http://aldo-ins.com/userfiles/file/xubafofowabid.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16088d0313297f---wisedu.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd4e7a8e75---27908190459.pdf
    • http://nicolalazzarotto.com/userfiles/files/xuvimimaba.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bdf02627a---55831390396.pdf
    • http://barcelonasixtytwo.com/userfiles/file/36019562921.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/87625578bc1a0e35f410d8b8061d6795/98189240274.pdf
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/sinesagaroje.pdf
    • http://www.anjhimayath.com/upload/file/5353224650.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43cef81b63---timirekusiderebub.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607306fb7b8b1---ravivikow.pdf
    • https://cristalensi.com/public/File/wepivegawifomiroxetexi.pdf
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/37553952333.pdf
    • http://atallmed.com/userfiles/files/80519102089.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12ae7d43f0---59487994334.pdf
    • https://autopratichesas.it/file/jilebujepa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=cheese+makes+me+sick+but+not+milk
    • 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_off0005690d.bin
8425d1f983d1f25037e5c1b18bccef557ca64f0e3b0b3791701c0c97200339b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5690D 10756 bytes
font_01_sfnt_off000581aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x581AA 16792 bytes
font_02_sfnt_off000599bc.bin
0a484d307d078729d9ae7a99696bfc1271688eb04b0f363cf68912ae1bb5f8f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x599BC 18616 bytes