Malicious PDF — malware analysis report

Static analysis result for SHA-256 057d735018f0e667…

MALICIOUS

PDF

91.5 KB Created: 2021-06-28 21:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 228345ae30b2769522ca2843d9a18bf8 SHA-1: 5c5a08cd49058f9424d90deb9f3f47fedf3703a3 SHA-256: 057d735018f0e66760dbf9d5ecde7d99cbaade3cda4f09dc83d45897a2a48f10
236 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam lure and a password-protected archive lure. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute further malicious content. The document body is heavily obfuscated and unreadable, but the heuristics strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc23c10199---matejemamegawupob.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7e39a244---54921804652.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/f387c51334f38e1d7e803fe33d1839fd/92195957819.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/gugepiradulezunu.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/viajrmlrvitmmr3rvlv2ika71d/41203701140.pdf
    • http://sl-light.ru/design/img/upload/file/81348825702.pdf
    • https://dienlanhbachkhoa.info/upload/files/nakokerupejuzewokutukobuf.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cfe170e504ff1744187cdaf0002e79b0/5589191813.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/9hi52qfv42vt9q1v66gasb55vn/jelakenizikubagezawiji.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/7ce0b631a854ff17c0ed1927446e3f45/32330899200.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/e64e075437fd64e7fbbbd44741461a0a/baxape.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/i4q9eb9nr0r3moi60cbgghd181/19860021163.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160afe6feda722---88519191626.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb168d38b---22221611541.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091888179b24---vonuzolotipitaten.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b463c546145---40893209849.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/690d1a5874efc7f392ed2ecb4b406301/subogefazexuzite.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b891c914e3---49923640139.pdf
    • https://burlingame.com/wysiwygfiles/file/50743000632.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/c4d5998d48d302c8353109f2291f56fb/2401898302.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/motopatepibutomefukuz.pdf
    • http://bagiez.com/userfiles/file/sugak.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d1ecae89f---96457232891.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=cost+of+irrigation+water+in+india
    • 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_off00010280.bin
b853efbfc77c867bdc376c0eabe448fab06a6da558cb4b0640c29d2f9bf2dc02
pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 17448 bytes
font_01_sfnt_off0001306b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1306B 16792 bytes
font_02_sfnt_off00014882.bin
53e2c8159179f37434ee3855d477a799804635278e91a397dc2fdaf6ac66778d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14882 10600 bytes