Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2de4fde6b3cac1…

MALICIOUS

PDF

161.7 KB Created: 2021-07-09 06:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f0e10b8ac201fc624f50deb603c313e0 SHA-1: 9ec8c5bafdae204404828370a2b7902f17c4bfeb SHA-256: ab2de4fde6b3cac111ed0732ca0cb29e5b2024bad549292b75c3be4524f21aa4
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple external websites hosted on compromised or disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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://aldea.work/wp-content/plugins/super-forms/uploads/php/files/10ebf6fde1ca4704e215896675c3a681/wolowixegire.pdf In PDF document text
    • http://dfh-consulting.com/userfiles/file/jenixelaga.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160949a09ee4a5---46919811944.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa65c43f3e---berasixijobujit.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/laxuwagadezufedirej.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/8f0e1f03ae201f751172c4e2e31a984d/68091755213.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2d90d800c---liwawitapepa.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c35b69cd0a41c8df3dd9dd6ccded6dd6/95929046173.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebc485f750---65155482943.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/ae0ae652b3cffff92ee70f9e5e78b591/31016462191.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/26336583273.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/566f5f7dcce626a27606f6a93a1625c9/72915080632.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/urvsbsseh835r694st2djkn102/pujemujofu.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/5f95494d300d9a4d64e044b0ea291dab/32965259311.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/6a0fede72d2e32d8d057f32f15a2f128/mukep.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609743ff37ee2---78618424275.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a653ea0a4a0---91675283795.pdfIn PDF document text
    • http://rhondachem.com/d/files/sowup.pdfIn PDF document text
    • http://dentherapia.hu/files/file/94771889169.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d448adb4b72---zuwol.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/3929358654.pdfIn PDF document text
    • http://faradbox.pl/files/file/71790046016.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/96953616095.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/btm7fcmlqjqrfc3q8j20ukqvnm/fojidisaxuxoxosa.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fd6d913b9---bufuveta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=takes+a+ride+nyt+crosswordPDF 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_off00021663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21663 10572 bytes
SHA-256: 3bfc98f0c97f3cd98cd367eca650614a7857a5637cf8bedf6871c51856dd1887
font_01_sfnt_off00022ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22EBF 18660 bytes
SHA-256: 53f8a97689ef32a96d08a540606c9b51216cd5669f35f30211712d47a1b5df81
font_02_sfnt_off00025f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1