Malicious PDF — malware analysis report

Static analysis result for SHA-256 584db93e0d49074d…

MALICIOUS

PDF

139.7 KB Created: 2021-07-01 00:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3aae866fdd14cdf39898f92aab151e86 SHA-1: dac9763404f716d8f87b890fa8ec1fdfa4e64c67 SHA-256: 584db93e0d49074dfdc246fd0c3466965ce5d70cdca5b6ee4372f322b5534751
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution scheme. The file's structure indicates it functions as a link farm, likely intended to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=order+by+operator+in+sql
    • http://mediaworld.pro/ckfinder/userfiles/files/39882006563.pdf
    • http://eltonltd.ru/sites/default/files/uploads/nuguxaturapizazoki.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160885096a7344---pewisediwoxevawem.pdf
    • http://yuanyoujie.vip/userfiles/file/21868304047.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1d2d88853---memavuviwubudi.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710f633ebd5---xifiti.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/usnaft72hg5dmh9ho5nfgo9elf/82017943827.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/g9pusfv47364qndi33qrfoietn/62092314642.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/h3edptpi46p3umlg3lp6svuha3/xaponogexanaduwebuzepas.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/73d5076b9c0a76413301933476c8c73c/josiwixipogumoxusigox.pdf
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bupilosapiburafizofeme.pdf
    • https://cafesca.mx/ckfinder/userfiles/files/99693351140.pdf
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/19481571050.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d288aaf7---74337746828.pdf
    • http://delshadian.com/public/userfiles/file/22995596690.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/3c16501474394d7583ef31c3ceb50b64/guxetifijisiguw.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/2979fd04d1fe51db771035990868a0b8/batewe.pdf
    • http://peaktoppet.com/ck_imgs/files/32609272568.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3143b30be6---gufewisivifajarulov.pdf
    • https://tolgyesvolgy.hu/userfiles/file/jovutadakoguz.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade6da39620---gaxuxaboratumebokiguruw.pdf
    • https://pmms-online.com/assets/file/dabotow.pdf
    • https://zegabilisim.com/calisma2/files/uploads/luzifavanifobopijit.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a4a51ce68---zezonugabo.pdf
    • http://chronicles.ae/userfiles/files/divuw.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_off0001c1d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1D8 16792 bytes
font_01_sfnt_off0001d9ea.bin
5cb1458cf19f098c3adfd2397444e317604a1128bb8ac82ec0504f2dc8a96ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9EA 17760 bytes
font_02_sfnt_off0002089c.bin
c8e7fa9978e6087f2f0bc2f9cba189d0e10b45edca89e9fed8694dcdfdacb34b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2089C 10808 bytes