Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c1a03814b79da4…

MALICIOUS

PDF

87.5 KB Created: 2021-08-19 21:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 5b60df1ff8c10298dbeb22314bc2cdeb SHA-1: 2380c5f138f530e9bf508bb12728101ca3db6ce8 SHA-256: 69c1a03814b79da490f5f4b22f07f972a9695ed423476b4125f3334c7b1f0bb9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to these external resources, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ehsclassof88.com/clients/7/7f/7f6c4973f16106f9a1f2948091db50b4/File/36689561267.pdf In PDF document text
    • http://zaun-produzent.de/userfiles/file/67747745319.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/58571372605.pdfIn PDF document text
    • https://upaspor.com/resimler/files/274646656.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087987bccbbe---74025468891.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e819ac89---fegijutoxuta.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/94272356947.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/e5fcadc78bceac96dbef4d878719d848/47637229533.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/kamene.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/25447163525.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/35820729784.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a686516e126---jemaxonizewefo.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8ad778493---tujiwinopasesarelutekebuk.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/bowelalakaperad.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce8d4f2574---jopitagupugolos.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021050218184289.pdfIn PDF document text
    • http://teaneckhs1977.com/clients/67867/File/xipavet.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/gikapo.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/barizojerumogojek.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f22a426625c---bititalatofoxudawazug.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610033e728519---barevironebukez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=recep+ivedik+3+indir+720pPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3E 24380 bytes
SHA-256: 21a206958dd94842b3fc61d595a5c907301ef19d41992a40f5c39762d96449e4
font_02_sfnt_off00013649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13649 10580 bytes
SHA-256: cafff3123f154081112258f145b439bdf7a93039d9fb5878e19d463a41f38683

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