Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb892fc1354e0e7f…

MALICIOUS

PDF

88.0 KB Created: 2021-06-29 02:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 74a09e7b55ae6d7c0105f5d1681d03bd SHA-1: 11a45e1bb441729b8fe1f2182d122298e3ec75ae SHA-256: fb892fc1354e0e7ff62f058b769576139ed0630a5762be35dc930c7d5c95d2a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous links to potentially compromised websites, likely to redirect users to malicious content or phishing pages. The presence of multiple external URIs and link farm heuristics indicates a deliberate attempt to distribute links to various potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mujeresenmovimientoplus.com/userfiles/file/kumokoj.pdf In PDF document text
    • http://beerskiboot.com/img/upload/file/dudatadozudoparit.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/em2g0fvdsm424liceikq3nc1a5/99739064197.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/domajewulu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070474ab2438---naxufemufigimepomuzepa.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0dec275a2---82575996037.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc42a942da---rolegotizu.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5u95o28g6h7uvk0vluh006sn57/juzebegemepamemis.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/43280371352.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608667594aa24---1930451056.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/441f91a2bb4e2c74f7b9ca9a98c09530/bekitemufaku.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780745a4527---dadilenifatexobokudowezo.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/42af9c86c5dbf74ab5d5edfce9e364a6/ridolirirapofigaw.pdfIn PDF document text
    • http://erex.hu/upload/file/34549486633.pdfIn PDF document text
    • http://bio86.fr/fichiers/gopemajidobezowe.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/tolevomiminepomasamoru.pdfIn PDF document text
    • https://scanclean.bg/upload/ckfinder/files/69454788361.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160831644127c8---11637486344.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/7af37ed3c24dd1b3e331c5763e44c09d/92405247761.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8236b401c---51044454207.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/kemebupazevifujanonivufus.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/76554157889.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/dogagugav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=capital+of+new+mexicoPDF 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_off0000f25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A76 10592 bytes
SHA-256: ebf97e7adc507daba4cbc22967be62c504183e0994e4a7fd615691cc7c8f7ca8
font_02_sfnt_off000122b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B9 18016 bytes
SHA-256: 2950fd698a15574c29bd3192eb14661e0bd4c6c9bf58876b4423012b59ade679

Open this report in the interactive analyzer, or submit your own file for analysis.