Malicious PDF — malware analysis report

Static analysis result for SHA-256 3802b3497c6cc971…

MALICIOUS

PDF

84.6 KB Created: 2021-07-20 18:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 8dc40c248c854d9b1bb055d4c230ef7b SHA-1: 69f05cdaaf20daa7ff26f276aa7ecf98eeb1e470 SHA-256: 3802b3497c6cc97163479c0d4e7ef8d0667bb0f52959c14a21a4fc329126f673
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The presence of these links suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/39945936420.pdf In PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce77717fc8---83920730997.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/kf8qpgmg7b96li8nfc0vljpjo4/zovakinajajodolul.pdfIn PDF document text
    • https://mimpishio2bet.net/contents//files/gavexasagaxigebiko.pdfIn PDF document text
    • http://vasamo.org/pds/userfiles/files/sowanapu.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/bewifituja.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/c0ec3bdfb101ac90a921f736d8fd88cb/53970927034.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/tiviw.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f788bbec1f---konib.pdfIn PDF document text
    • http://flomojapan.com/upload/files/lamilazogofumelel.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/23663638289.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/49ef8o4kln92ejdnsbj2atrtdf/fapupezewe.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/q40qtcs97k799f12n1g2l5si1s/36591382452.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/xokogigubusepis.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/99832e09deba401415dd69829a5b017f/bosidijukomovututilolerox.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a02e1b2bf8d---fuvep.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/wolonitawifefegilifigo.pdfIn PDF document text
    • http://rockghs1965.com/clients/8/8c/8c68d0bbb6adb8fad5f76254a0516489/File/76791540263.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/fajejodevuvotolowezafitob.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/h7rn8hq76eurgd61dtu1u18np1/rirexupe.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8e6d9f3f9---24010353755.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/13495978803.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/dazidegiguxisurosufamasob.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/sutazuzijobolazoro.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc7ae42fa3---75545135927.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=shingles+and+contagiousPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 16796 bytes
SHA-256: 43daaf9cfc65d2122b11bd35eb992cbbae956429b800c90ccac348c5df51f7b8
font_01_sfnt_off000114ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EC 10724 bytes
SHA-256: 451481c627208d13dc3ecb7464d7470f2c0530fcbe62db6b584901c480f20d42
font_02_sfnt_off00012d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1