Malicious PDF — malware analysis report

Static analysis result for SHA-256 071c30f8ebd32e7b…

MALICIOUS

PDF

85.4 KB Created: 2021-09-06 08:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ca2144a57b6a3ba4f5ef6e01b68f87ad SHA-1: eb598ec4a306bf45320fe0241441f3d495150a30 SHA-256: 071c30f8ebd32e7b815ab3f983fa25498077af67b8c7594bb375d5a38ae8b415
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://247hvac.ca/fabulous1/uploads/files/lesizido.pdf In PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/vevabetajanopesisuzawib.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081645dd0dae---60330644047.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/25614637349.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/33882333439.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/44306404330.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/kapagigigolejematadomug.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210818220040.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/kagolivoxajakena.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/ganupefutusewuxejub.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/18167073663.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e22b212abb1819058dace450706c98a4/61875539806.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/11770737493.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/af16kr3hl7pghillt0pcbddoah/43807991800.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077da080b78d---juvobodejelam.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/73126477500.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/79500463633.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e6fd7db33---beporirusa.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160942470a0816---tuxovigo.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607f57245bd32---gibesexigufixojupewew.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8d74044cc5e44e6ffa02b98f40538b39/53413860871.pdfIn PDF document text
    • http://palami.by/images/file/nodol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+laundrymen+jeffrey+robinson+pdfPDF 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_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 11112 bytes
SHA-256: 5d2a79220b29716ce10329b4c5064219f10222ca4265b7b63d51a47dcf4e4dfb
font_01_sfnt_off0000fe95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 18736 bytes
SHA-256: 8d05ac8c4982be7c1722396fed7468421b94da7c85ad38c71264754bf3311b50
font_02_sfnt_off00012f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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