Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34fc5563b0ca414…

MALICIOUS

PDF

80.6 KB Created: 2021-07-21 12:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 96d60c23b895040a2d5196310200b3c4 SHA-1: 7e2ea84da3e2ff1a00a8e0b867f634c942ec54dd SHA-256: b34fc5563b0ca414b9e7085726e1f48c557e3ff672b112ae49e06ecf4f97eba4
124 Risk Score

Malware Insights

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

The file was detected as Pdf.Phishing.Trojan by ClamAV, indicating malicious intent. Static analysis revealed it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable domains. The presence of these links suggests the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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
  • 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://bettaletroom.com/file_media/file_image/file/liten.pdf In PDF document text
    • http://zoldjogsi.hu/uploads/files/20221602034.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad78cdd6c8---koreruvamizagitewetiku.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/poluzapaxabop.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c71b69b0c---77581377486.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/1912382673.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/25d27df2ad33ec89997545a2b3cd84fe/3485148398.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/82532071178.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/c50e9398e75e1805a27c7f15c1bc1279/dibeza.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b16e558bf0---pazelikeluwarut.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/99608495727.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/ekpsf022gr0se8h52csaieq387/71413017706.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/pekagarogin.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8833e52dc---49352640561.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/23648bbf84b3a08dbb90abe04f5aabc0/zobeninazilamij.pdfIn PDF document text
    • https://aneri12.eu/res/file/nejaxuguwe.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/73661476714.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/51342046859.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/ronupagulebujefutinu.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a98a6448753---xifijiv.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/4328423801.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/7899224963.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed4357a8e4---sufimegeki.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9e437208c---panal.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/73653123521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=excercises+for+latsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D4 17248 bytes
SHA-256: 93d9e767389882ea93ca55e3be74f900302d935251989c2a6238ef5cfcb34bee
font_01_sfnt_off00011dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDA 10312 bytes
SHA-256: 3a713fc10124516baeaa81764b8ca836c7e49c633ffd4ac41c35ceb852299fce