Malicious PDF — malware analysis report

Static analysis result for SHA-256 01efdc292c12416b…

MALICIOUS

PDF

98.7 KB Created: 2021-06-26 23:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 437d487c18ac9c49c25701e6e6c349df SHA-1: 87ae3c3298e1788d5c2e508515d3b99b2df66cc3 SHA-256: 01efdc292c12416b95237b75d45ecff9575f9f2f2d16df71a790e8d37a4d2839
196 Risk Score

Malware Insights

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

The file was identified as malicious by a ML classifier and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to distribute further malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct textual clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 7

  • 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.
  • 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://festival.bg/fckeditorfiles/file/96697112004.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b7bda74a8---23928323665.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae76efbf56e---bapilegawoxu.pdf
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/masidi.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf427b64084---66255466766.pdf
    • http://lltsg.com/uploadfile/file///2021061901110227.pdf
    • https://auto826.com/uploads/files/mikepow.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dab3d6c8b---bidowakubofutapowan.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/gp4dan7i2odhcrh5pd4bfafpp5/77501832101.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/64649gegu1ku0okvv5kj6chrc2/wifepada.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/3c91c93b63e7dd514fabfe3dee8dd4d6/90914604284.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844d5ce08a4---56391812011.pdf
    • https://hunde-katzen.at/soubory/zebuvopelugov.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d676e9fc40---6607183378.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/79blht0kv220fqtse18uh3mnn5/76358589749.pdf
    • http://vagtteam.dk/userfiles/Files/82429513914.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16089a2e4e9b64---85074281428.pdf
    • http://pallenberg-busreisen.de/uploads/files/39398052256.pdf
    • http://komputerzagrosze.pl/userfiles/file/1570491894.pdf
    • http://beijinghuojia.cn/userfiles/file/26058182785.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/10f76dfa4f9b42f0fa8fc8f388f90b5c/81643190464.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab3cbec9f4---kufajofisozedumopepax.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/c69fdd81a732b695e4f4346f3a5dcee5/84907527826.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e83e9e1786---2260457795.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/1sk7975vhh9pkjmqmilfb84tc1/94472705076.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c540b7a8959---97079302275.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=eagle+scout+application+workbook
    • 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_off00011d77.bin
5a0a6f461d5d1f89dd241b729a7f8511affc46d63bde7a3d262ecbcdb1dc8323
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D77 17544 bytes
font_01_sfnt_off00014bc2.bin
4926d50cb7900b4f7179b68fd147dae2031b6175eb50885702e116d079eca759
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC2 10948 bytes
font_02_sfnt_off00016524.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16524 16792 bytes