Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c278b92e3390426…

MALICIOUS

PDF

83.1 KB Created: 2021-06-27 20:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fea0aa3cb240fe22c758514894d40e53 SHA-1: a537494a9474606a9079d5438fb079e4ba56ee92 SHA-256: 7c278b92e339042647b395dc2a8cbb840701fcbee88795099d50ba1923533859
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm. The presence of these links and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/e01a1d158f86bc369300fd02bdc73dc9/93587424400.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/a0cdba9c51a69f0df468456ea9f0b0a7/65456231607.pdf
    • https://poolpoint.be/uploads/file/wolevarafesut.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/9ad2d95c1f50139b9285d1a05b1bdbdd/vuzogowokudo.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3a03408dd---kidom.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e274ebcec6---21539956071.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ced56bfaa5---49484540217.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1a1f1cd51b8499e330e6e30cfb3c6354/ximigederisivi.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/5597638593.pdf
    • http://rbtyutj01.com/userfiles/files/66298917547.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210626172919.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608151ac599c1---87348201349.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/0a6ff5c03352ffc40771600f2150ae85/papuguviwawiw.pdf
    • http://magogaralbamoble.com/galeria/files/15630124641.pdf
    • http://nomaquito-travel.com/editor-images/midigopit.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5c4417b00---dolegupewidikewa.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/652494ea4247fe7ad086284833179d6a/tonexagobawu.pdf
    • https://b2b-intelligence.it/uploads/file/bukanasod.pdf
    • http://superplasticizer.cn/d/files/41603145707.pdf
    • http://tiramisu-o.com/yamituki-n/uploads/files/37591640844.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/kmirn9jjihfpe3khkblen6gfqn/97849715707.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f21e3a418d---63969438149.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cfdc3589f---11048383435.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c7140ab2352---momiponavekobezeniw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=i+love+you+always+have+and+always+will
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c6.bin
d9f0652f5d7e624cd54960455aa5453dc535df83cfae8346046e9c806049e8a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C6 10464 bytes
font_01_sfnt_off0000fa7d.bin
7ea90036ce49fc28392ece410923a89b73e0129a89ed8e7ff1c95e5ec1c0dd8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 16968 bytes
font_02_sfnt_off000126d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126D3 16792 bytes