Malicious PDF — malware analysis report

Static analysis result for SHA-256 145a15dd9c1686ca…

MALICIOUS

PDF

91.0 KB Created: 2021-07-08 07:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd020241115ac0ea581bd31b14ef435a SHA-1: d5d0a470f4b2e7cc08de985a1d863e74bf02ee13 SHA-256: 145a15dd9c1686cabf31ab3e18db141bf1d7037495d4cbb92ff62308e97370c1
196 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam lure. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves tricking users into clicking these links, which likely host phishing or further malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ht9ialr7ec4l98bk92gvpetba6/mufisetigijodisudilujume.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb5c0cc329---31706121700.pdf
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zofivukiwoxazejibefapawa.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/pctk5g0jg47ih2oqblpns8urp2/bimejafufax.pdf
    • http://lube-stc.com/ckfinder/userfiles/files/jiveniratanokilex.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/8d63c4013f5750bb51df684796d9f0f9/31086393563.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607211e9e0ad1---51407208488.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/82a0314cc9fbd211560ab1d28a10e0a1/xosutapenamevadusuxi.pdf
    • http://digemnd.com/UserFiles/file/sujuvuxerada.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/42fc3b07c49cf5946a4f7d6dd1cced4a/xulubusoxu.pdf
    • https://myphambambi.com/webroot/img/files/69836837573.pdf
    • https://doktor-ara.com/userfiles/files/616523153.pdf
    • http://asianmosaicnyc.com/userfiles/file/dirudo.pdf
    • https://soportedevida.mx/ckfinder/userfiles/files/kimiwewazinef.pdf
    • http://originalcheck.it/public/img_admin/file///31830244875.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608befee0d64f---70109290978.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/3842aa9a532be3c0734ea96f20126a01/kevapurapisogifofinirizam.pdf
    • https://rkdestate.com/userfiles/file/juniv.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee596037dd---7098720176.pdf
    • https://adasms.fr/userfiles/file/kujirawibaxiw.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/31b09d7774d07f80ca6e2a5de6e3c59a/ronaxiti.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f50130e8ba---78806560047.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/95897176280.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k3k0t45hebl9k9p2vloaijm6j7/92963757416.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607255b338604---89067116024.pdf
    • http://keramann.ru/uploads/files/nasegoxuxi.pdf
    • https://anthonygillant.com/userfiles/file/devebo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=when+will+the+house+prices+go+down
    • 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_off00010271.bin
b384aa6a92de77e28126b19ab3fb37cb5111af8fa8f0fc2ed7bf195d5578586a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 16692 bytes
font_01_sfnt_off00012dc8.bin
44951be86cd172d97eedc147aa1190000fea99b0aeb5671bc7893beb1390e038		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC8 10812 bytes
font_02_sfnt_off00014680.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14680 16792 bytes

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