Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac5392929a944a0…

MALICIOUS

PDF

95.7 KB Created: 2022-05-26 22:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: ba01ba526507da5a328f5e2934c0bcf0 SHA-1: 3df8fbb4690da444af5c0c06529de992f7613ca4 SHA-256: 9ac5392929a944a07d40380b50b4a406488134b38f8cb115998c05d4cfcb1983
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic specifically points to a lottery or parcel scam, designed to trick users into clicking external links. The PDF contains a large number of external links, many hosted on Weebly, suggesting a link farm used for SEO poisoning or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://norin.co.za/YmrXLWy8?keyword=system%20analysis%20and%20design%20notes%20for%20mba%20pdf%20download%202019%20download
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/nabilumufiboxe.pdf
    • http://sadbaindia.org/admin/kcfinder/upload/files/vomunotofex.pdf
    • https://pixipesigogod.weebly.com/uploads/1/3/4/3/134370637/50e34460f27ee3e.pdf
    • https://vazasajiverer.weebly.com/uploads/1/3/4/6/134609599/a95b6e87014cb7.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/162506778beb65---36638062377.pdf
    • https://bativazuwa.weebly.com/uploads/1/3/0/9/130969541/6502685.pdf
    • https://xekuvezenigut.weebly.com/uploads/1/3/5/3/135346982/f8adaf3f5.pdf
    • https://xoxujodega.weebly.com/uploads/1/3/4/3/134363828/bojezata-famofekup.pdf
    • https://fefaxositepimu.weebly.com/uploads/1/3/3/9/133986539/139083.pdf
    • https://vopudupanite.weebly.com/uploads/1/3/4/3/134317176/mudofuge_sejufoxilutuvo.pdf
    • http://hb-hospital.com/file_upload/fck_upfile/file/82445524890.pdf
    • https://vowuzuvave.weebly.com/uploads/1/3/4/8/134884034/7323452.pdf
    • http://personalmap.com/UserFiles/files/xuget.pdf
    • https://sudarixadozitot.weebly.com/uploads/1/3/5/3/135331315/vexetevabozil.pdf
    • https://dogubijeg.weebly.com/uploads/1/4/1/2/141260323/nufolasudibag-xilotejigivuwa.pdf
    • https://pepakulal.weebly.com/uploads/1/3/4/8/134885681/laxatumumesiripo.pdf
    • https://rawakukegategif.weebly.com/uploads/1/4/1/3/141393029/vinevuwatef-sexufuxejiluw.pdf
    • https://suripukizoj.weebly.com/uploads/1/3/6/0/136089511/xikonofe-rumebatipi-difadilir-matefimurez.pdf
    • https://xupuxubemuri.weebly.com/uploads/1/3/4/8/134872551/2538153.pdf
    • https://jupaxegusuwe.weebly.com/uploads/1/3/5/3/135389123/xuletexolox.pdf
    • https://refunijuxi.weebly.com/uploads/1/3/4/7/134748157/7544c7e76117f.pdf
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/6132700.pdf
    • https://dovewonarada.weebly.com/uploads/1/3/4/6/134672256/viwixetevipo.pdf
    • http://lerangement.com/upload/editor/file/9531404263.pdf
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/zuziliw.pdf
    • https://rejulilaw.weebly.com/uploads/1/4/1/3/141320986/58358ad8.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_off00010e48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E48 16792 bytes
font_01_sfnt_off0001265f.bin
d1c4144104036313f32f071b4fbab9b37ca5b1933956ba8c64e4f2ca81d4125c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1265F 11720 bytes
font_02_sfnt_off000141fa.bin
225eead38318f0ea8a11dfaa7fadd6e469c82556763726a84723b2d9fc3c2c4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x141FA 17420 bytes