Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83f64024aa18bdf…

MALICIOUS

PDF

105.2 KB Created: 2021-06-28 07:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f01efde8aac276989d95d6b4effee92 SHA-1: bf9989399961de227c8aa667707d8052413ca821 SHA-256: f83f64024aa18bdf81710c89017819e8779224144477dbe9e7f4df1ede91d0f6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, luring the user with promises of wealth or prizes. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a distribution mechanism for further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://smidgel.ru/uplcv?utm_term=wealth+first+portfolio+managers+share+price
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fed33de7be---mojum.pdf
    • https://tecnicadovolante.com/images/file/goreruxuxetuv.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105010420551263.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3ea4e650d---gudeganujaxujalopazetano.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a168248388c---89070189679.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609891c44957f---51307481238.pdf
    • https://bahia-group.com/ckfinder/userfiles/files/zoxonedulisajobupew.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d6ad71031---foruvefufuki.pdf
    • http://ever-pioneer.com/upload/files/78276179033.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861db9d7e2a---45738186301.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160be0c379a529---wapoto.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/i4657rbkm6o0aj1smsgqlotdem/75323865352.pdf
    • https://annjulieskarpmo.com/userfiles/file/59402409.pdf
    • https://art4you.sk/editor_uploads/system/files/38571336403.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/edb8db24c22b8e47cc4bee6052f06db1/zomuwo.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/5100bb891835056a939c761bbfb716c6/gulafulimupewufizase.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095aeb46b246---32839752558.pdf
    • https://t2sc.me/userfiles/36087384762.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c44436f6f31699bccdc883e8af79a82d/48729499243.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d75b1135736---xolelavule.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f487b622b6---9980058200.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6e63ec5d7---73507650863.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/dohluhgt1gvdk6jvocv4uoqrm1/13369735325.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ac070442bb7a488820cc6b2abe4a1bea/70354408215.pdf
    • 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_off000136b4.bin
3d8a868221a42cae05ffc49dc881dc7e30aafa81a456363e94324af094b2dbc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x136B4 17888 bytes
font_01_sfnt_off000165fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x165FA 16792 bytes
font_02_sfnt_off00017e11.bin
0ec8fec3be38d481dff04c07f1aac6217c611b951bb726bc338c6d48b1054f15
pdf-font-stream PDF embedded font (sfnt) at offset 0x17E11 10920 bytes