Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ca71a14c8f4f6f…

MALICIOUS

PDF

149.8 KB Created: 2021-07-07 05:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2c3c393ecc0f55d2049f64a3f14af00 SHA-1: bda355791bb71c8d3390c2ce6dff319cde540b45 SHA-256: 20ca71a14c8f4f6f96e99b6bf2732cffc0f6ed66d22db258fdb43154c3855c17
236 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, presenting lures related to lotteries, prizes, or parcel deliveries. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document's purpose is to trick the user into downloading a password-protected archive, likely to bypass security filters. The numerous external URLs embedded within the document, many pointing to compromised CMS upload storage or disposable hosting, indicate a distribution mechanism designed to host malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

Heuristics 8

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://drafthe.ru/uplcv?utm_term=female+flute+player
    • https://tylbm.com/Upload/ckeditor/files/70342562104.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe4284cc87---51912804136.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/26867755629.pdf
    • https://phillismaniglia.com/wp-content/plugins/super-forms/uploads/php/files/6700e4d6b00147d13a972daa20b4fbc0/83675014955.pdf
    • http://immobilieninvestors.de/userfiles/file/63224876106.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd172daf9b---sedatarozusepazid.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083b507c0ed5---worupolapa.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/ace30b46d1206f506a9a6b1e745a001a/xoxugenajewezitu.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075c1eb20667---jejogamatajilidenexexawa.pdf
    • http://ellerbeefamilyreunion.com/clients/874543/File/39690176751.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/5lfuuhnent29e57dortdu1i9fa/13981627802.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/r4hkosjjqedmf91pvcf5bdg2q0/91873325248.pdf
    • https://ipic.vn/userfiles/file/fisovuralikojotirim.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/09c16e5fb63e63db04f1257c85c8e206/12181344917.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/xusozefutuzabenaw.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c35d1e401---46232158538.pdf
    • https://areicon.com/images/file/14672412468.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/c74e08c868c50e78f1d12267b2d4d43c/56288777029.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/qt0pb2fnk4e94033r70ljmda43/pajubolaruxuz.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba787dca1bc---49700353139.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb819651039---xawugageti.pdf
    • http://centralgiving.com/media/userfiles/file/wejugowa.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/38b724e469a94eeb3c9f5c251df09feb/nimuti.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/5d3640714f9d948e4c2317e04ec1be2d/4338032738.pdf
    • http://ckpak.com/fckeditor/userfiles/file/64669059208.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/0dkr2519iljjji7estf6otd2js/13579894265.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_off0001e9ec.bin
7a986de73764681feebe15589949a71e3ecd0ba35c2739d29963859bd6a5996b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E9EC 18956 bytes
font_01_sfnt_off00021a2d.bin
58a3a25a5731885e8ca8e958ae0486fe0f9c0e23687a50770edeee7dc8db3c9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x21A2D 10224 bytes
font_02_sfnt_off0002312d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2312D 16792 bytes