Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c00cf6df56ff85…

MALICIOUS

PDF

82.5 KB Created: 2021-08-15 23:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5fa62bf5ce586c66233b6a9e442181e6 SHA-1: 728895c0b050ffb764a1a5cd563f0c67c09b3d58 SHA-256: e7c00cf6df56ff85d1b92372c631288a62ee39f41509f6af4a359384b6939738
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to multiple compromised websites and disposable hosting, likely to obscure the true destination. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drukarnia-skawina.pl/app/webroot/media/files/97223180815.pdf In PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ce8429d3e958b7d71c3a93120adc48d9/lapoponug.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/fijesitamivitebaz.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/30776710274.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/xifitusalinone.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/c7daaec7047f4595e7ee9126c23a74a4/32337422618.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/xinejeviluvopiri.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/segakiba.pdfIn PDF document text
    • http://195exim.com/datas/files/90632853562.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766091bccc2---14099626877.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/65737051998.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/40448203613.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608058a915d4d---60889457161.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/xenaxorekadewapub.pdfIn PDF document text
    • http://jucal.es/images/file/fopovupinunebarapilosupan.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7844be628---932693156.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/340fd467b950bcb1146eb937f945f5cc/vedakabegenefizazasudadi.pdfIn PDF document text
    • http://janatalnajaf.com/basefile/janatalnajafcom/files/3185209962.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/s7qq6395lvtgumu6dv9pn4av1u/58171334043.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4af7e73acb---fageluravul.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/bigodutaberoremopefodej.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/50687624433b8f49f564fefbff1e4c9b/gokulesatuduvelajoli.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/b49ac4d6fe391d11f18876053964276f/93959261624.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/4c853f1304b63f02cda0bda932d3abf0/55465226249.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/gulenemijapoxasu.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/gozopukagifutasakizixiniz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+sims+freeplay+apk+mod+hackPDF 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_off0000e0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 16216 bytes
SHA-256: 6222bfff17225b848c19d73e22b84342921118563f09e349933fb8f2c0ba06a6
font_01_sfnt_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B2 10852 bytes
SHA-256: eb2c5db9e7a56fc34139f44466804beb6deff99ca4c5cada0a4f362e7e634dcd