Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9f51766285f13e…

MALICIOUS

PDF

83.7 KB Created: 2021-09-21 12:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 9c9fcd1eb8333e17e5ef59fa320a254b SHA-1: 9adfc3621af202969f46d4fda1324a616790c3b5 SHA-256: 0e9f51766285f13ed4d4c9ffe738330e02d3c59699b647a30b094a6bab853e67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to various domains, many of which appear to be compromised CMS upload storage, suggesting an attempt to distribute further malicious content or phish users. The presence of external URIs and link farm characteristics strongly suggests a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://wastran.ru/uplcv?utm_term=pokemon+sun+moon+game+download+apk PDF link annotation
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/bavunutuju.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/feneraxelulujunotiranudof.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/15074166343.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/84031843248.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/9411439731.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1a29010c1---sotikejiwibefus.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16132d2bd729ec---japumadigogafe.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/65150805153.pdfIn PDF document text
    • http://newo.ru/files/files/gebobawujuroworabawexixuk.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/wunipobozizajafukaj.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/pabonoxulijukozowod.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/25282965807.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/41427902431.pdfIn PDF document text
    • http://faradbox.pl/files/file/84208712394.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613138d7267d6---12704744733.pdfIn PDF document text
    • http://www.77ice.com/upload/files/dukod.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/getasovesidasopomedadoxuv.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/8eefb6c4f4c9d95a8e0c0bb8f85da271/3330056388.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/34835160774.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/6144882a241f6.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC470 20052 bytes
SHA-256: 41c173549782eebec0c725299b00407fb67d5ff209cddaed5f6d1289b4a419b6
font_01_sfnt_off0000f99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B0 16424 bytes
SHA-256: ef8701eb79685041ba51b48b3ed5be6a2743d899f5b89193a8f0275675b44e26
font_03_sfnt_off0001286f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286F 10724 bytes
SHA-256: f43b5248265e3c1244284f36c4a11102a5a4d7aa159b414d5c5922b871e69d46