Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76637125d0d119e…

MALICIOUS

PDF

77.1 KB Created: 2021-07-27 23:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e473fd1dabc1e2a87c5e743f5f55bba8 SHA-1: 8b43f94d696be46982a90fe608e3c115c960ab3c SHA-256: d76637125d0d119e56653b3f881a7b53926c34b5bdc1d9b3daef50e7800de663
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to obscure the final destination. While no scripts were extracted, the presence of external URIs and the overall structure indicate an attempt to lure users to external sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://stratasphere.online/userfiles/file/pevebegovukuw.pdf
    • http://bettaletroom.com/file_media/file_image/file/57636329875.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160723d5e8a660---gepidezozekonogowonalaxok.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/luvepitasavikole.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ff469326856---ragijus.pdf
    • http://amexeuro.com/an3_Uploads/file/jawapabafamebutal.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/3270bf0dc619611cf330e4e215aceffc/36663021550.pdf
    • http://royalwedding.jp/images/blog//file/89182479971.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe6006382f---29185115976.pdf
    • http://penzionklara.cz/userfiles/file/7255632381.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfff6900786---4225327837.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18e1aabaa5---93156804725.pdf
    • http://bulongvungtau.com/media/ftp/file/bewuk.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/858758d8b86abcb15a589e83d8d00fae/81634833900.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/4l1cbiqortoiagik2d4r26gd3s/79850913052.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/fc1ec9849eebfcabadecf6a46d68662c/23067907627.pdf
    • http://www.look4job.gr/images/_user_na/file/45167422038.pdf
    • https://fruitssupplier.com/app/webroot/img/files/88934093648.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/7606c9b565425ab7ad284171565d482d/werobemijakow.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/a2e818371cb78cdf4e2656297180b30c/26339022243.pdf
    • https://lecormier-menuiserie.com/www/upload/files/wijikikenuvanafupajoneva.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/2k942qts2e8m088me9esor289e/8549939466.pdf
    • http://coinmarketsuite.com/ckfinder/userfiles/files/66149508479.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=alita+battle+angel+2+full+movie+download+in+hindi+filmywap
    • 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_off0000cafe.bin
c12c42f59ca1605ac68a4ac10e9efb157f06d97632a657a01a79c22cc226e061
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFE 15900 bytes
font_01_sfnt_off0000f400.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF400 16792 bytes
font_02_sfnt_off00010c17.bin
64af414863a6e0cd8c91f6bf1a1a5cb552544fe36123a064d0b565ee86c75595
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 11284 bytes