Malicious PDF — malware analysis report

Static analysis result for SHA-256 982a4db321ac4e44…

MALICIOUS

PDF

91.0 KB Created: 2021-07-02 16:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d760725bb968c6d8513b756e725c2209 SHA-1: 14602c315805fca679abd9c38263b375ba1ae4e8 SHA-256: 982a4db321ac4e44d447e9e4e4af694daa2a4226927f5d267fe7be582a4d39c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, indicating a link farm designed to redirect users to potentially malicious content. The presence of multiple compromised CMS upload links suggests an attempt to obscure the true destination or leverage trusted-looking domains for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de321b6ca8e---zeviz.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c79dd9a4238---18438058505.pdf
    • http://npas.ru/pic/file/13986175780.pdf
    • https://daaeportrett.no/upload/file/digog.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/47904569e919a71925cdb04474bcba6e/3251348943.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/8d261965e6dfff3f69374b053b89e1a4/13699735351.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2bd37360b---39792620814.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9d70c1d63---nujuzuromoriwubigaz.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/d93c35f43d03a00d55c1e7942c9170cb/xevokegaxagamusimu.pdf
    • http://dashoernerboot.de/userfiles/riwewanajugelobedeg.pdf
    • http://sivam.pl/files/file/nunibe.pdf
    • https://exporoaster.com/app/webroot/files/images/pages/files/vunimitadunodusewobuku.pdf
    • http://pathtojanna.com/userfiles/files/40334315883.pdf
    • http://mesterek.net/tmp/93290523477.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b4607928f02---60601551327.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/kasifapivinidijor.pdf
    • http://royalwedding.jp/images/blog//file/gawesobipal.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86674573a---zajejipaf.pdf
    • http://anatolianlgs.com/userfiles/file/14567317971.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16084ced3dad67---1916336830.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609143d899b28---43368339921.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/0a06277871683897f77791cddc38d065/52599295898.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=136+divided+by+2
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98d.bin
bc57a30da97b51d282c51662045dbe05d579c80918c791b2434fd0a1b06cacd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 10180 bytes
font_01_sfnt_off0001008a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 16792 bytes
font_02_sfnt_off0001189b.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1189B 16252 bytes
font_03_sfnt_off00012e77.bin
cc2b0fa070694b64766262536f501c40c0bb5af121c8238c54508346bbb4401f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E77 18216 bytes