Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20212b7b546c7b3…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 06:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c250a4f97b0212369eafb93a75445b09 SHA-1: 088edc021c1b985c276d27b2e32a927fa42f6b75 SHA-256: a20212b7b546c7b3d2414a8b87d35bc02910f083210d4de2df78fc6f7a8bfe0d
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, directing users to multiple potentially compromised websites, some of which host PDF files. The presence of a 'download button' heuristic further suggests a lure to download a payload. No scripts were extracted from this sample, but the overall structure and URL findings point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • 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://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/95090526271.pdf In PDF document text
    • http://kjphotocon.org/data/userfiles/files/19711183378.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160824706a85b7---29398031105.pdfIn PDF document text
    • https://europartner2.pl/uploads/pojunax.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/febosufenedige.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/tepemobidi.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/453f1ac76b04b1b741287a605a035e39/81565530034.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25cd583e5b---33944572207.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/d7qnkcnsnnh5msiadmru4epfm2/57787078173.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/guxabovajubofomesovosujej.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/pidapokadeduloxasasuvi.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/tolikujawamobe.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/d4d4d680362d7cef65b93e6de4473ad4/bezavewugujinezipamikiz.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7dcbd4ccf5bdb1988e3c0a0b219fd837/85568088338.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/giwavixit.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070534dde7bf---kaxuzobazefek.pdfIn PDF document text
    • http://hevolta.com/upload/file/73675950492.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/ligoberekofoxurosabuvufud.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8830266e69---12899307422.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927f5b662c1---16618831266.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70071577967.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/9221814520.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/21872786227.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202107260608563998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=gauhati+university+bsc+chemistry+syllabus+pdf+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_off0000d4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D7 11428 bytes
SHA-256: edb8b339562957e0ae0d0d6c4405e47ca1aefd0755dc5879de29e96bfbdc9163
font_01_sfnt_off0000ef8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 17612 bytes
SHA-256: f042db11a2485bb69fad01de4ecf34671ff8d72a75f67285ac74ec26f3b42d5c

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