Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b2e91b03c20468…

MALICIOUS

PDF

84.5 KB Created: 2021-09-11 20:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: df0ea63f0c90f4034cf351cf2d5c9dd3 SHA-1: ea24ea21a291d8eef342544dd5b8e6fa1e0cb3e8 SHA-256: 17b2e91b03c2046896ad39874d12643be38a9d0c6c575d16ac265d39134bb20e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, characteristic of a link farm used to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://bbdecontra.com/userfiles/files/botedadanenije.pdf In PDF document text
    • http://mikomisushi.com/uploads/files/33457753056.pdfIn PDF document text
    • https://petikdaun.com/contents/files/64675220502.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/43709909767.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/68978980704.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/45356736107.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613370a861001---50355765395.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/69905184166.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/59433601292.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/99416626629.pdfIn PDF document text
    • http://dentherapia.hu/files/file/12594761167.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395ddf2f0eb---47317977543.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/91457691206.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/winonuvix.pdfIn PDF document text
    • http://gartenstadt-apotheke.com/userfiles/file/58355598986.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/32339462741.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cad824fd3---48895653235.pdfIn PDF document text
    • https://taperagi.com/contents/files/11335282599.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/8043443962.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210906_135219_140.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/17190046642.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/1295205628.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/10897147130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=shu+thayu+full+movie+downloadPDF 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_off0000e677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE677 17292 bytes
SHA-256: b1f3cf486e0324d9393ef54b6aa4d5c0cb8c9cf4469ed24cc317d873a0f89a4e
font_01_sfnt_off00011360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11360 10792 bytes
SHA-256: 1cfdfc03668c0d6ad5097456ccd27b7078b05840fa9fe2764b05c0a4d3628323
font_02_sfnt_off00012c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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