Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62e947d53749a6c…

MALICIOUS

PDF

98.3 KB Created: 2021-08-07 07:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 69d4ab718be7642488e63dd6abcfe324 SHA-1: 086c24bef23adb6ddf1cf01a9bc663819d5e7fcc SHA-256: b62e947d53749a6c3a4dbcbdbd28cb79fb18ae4038057d409cc60b130c6acc77
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing or malware distribution vector. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://cambodiadriverservice.com/userfiles/file/paguberuwemukafafopop.pdf In PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/girixududozezozo.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160982559b7761---25277548172.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/visajezavub.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/n55tktmmir6vjjse6ugds2en1t/tebej.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/0d3603b33de87ef32e590f31060662d6/kovexudolokunuku.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/f911c0a4a4430e644f55821b9cc02b48/81751287254.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/c2ce8b4591d64902cd22b22f23a38519/miviro.pdfIn PDF document text
    • http://topas.lt/userfiles/file/48555490452.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/vadawomoteranikusatoz.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/16868621109.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f47f7ee89---32730330512.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f2f1039a4dbc12e403a57f1471006f0f/20014824643.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740e28b1f37---24245697474.pdfIn PDF document text
    • http://alternatifhirdavat.com/upload/ckfinder/files/xozibowogebumedover.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/sumejavoduf.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/67618517755.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/7695653116.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607071f0d03e9---87370306873.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/podfnb2oph3lngnruik31qvi44/94395212347.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/xikuluzurozaxebobuxudila.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c897bad79dc---viwifojazam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=problemas+resueltos+de+distribucion+de+probabilidad+normal+estandarPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c331c8a12---22313166441.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://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_off0001156d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7F 20228 bytes
SHA-256: bb019824bf4eadd9c2545d112b6084cc61a22954648b3bea487df0eb84d2c443
font_02_sfnt_off000162ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162AB 10916 bytes
SHA-256: ffdb15c5317a3996350a98c8ebf93d75ca674b84352706af7e13b79b7b169de9

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