Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5247358306212b…

MALICIOUS

PDF

106.1 KB Created: 2021-07-01 12:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 38089c4565b9cc5a76d20288cfcf33cc SHA-1: df523a5dc95c63d47bb8384fb7dfff9551b2374a SHA-256: ef5247358306212b1e2d72fad81e57dedec2b5437a79b7ee4bd41bbe428ec8d4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. The file functions as a link farm, containing numerous URLs that point to various websites. Some of these URLs are hosted on compromised WordPress installations or disposable domains, suggesting an intent to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://masan315.net/board/imagefile/file/31379380611.pdf In PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d98212288---somakuvepak.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/edee0e8714b67f91e860c8a3782e9977/tipiwutebadovoka.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085178ed3a27---xelozoxitunewidunix.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/78614658148.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/d53dec54260550400d4a4004d86e8ab8/18628819166.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833b41b108e---kopiwawolafelimuw.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc196d6788---66973272798.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/xezuguxuvedo.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a14bb2aa0ec166b9a3fb66398fb16845/12242033785.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d67a132c6a---kinawi.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/14958489116.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbff119b1d---1367293876.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16078026b8074a---74651951090.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc49fcf10c---20565774781.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/15205793499.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160d91ab511a50---76881976065.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/i846amf5ccrmsneq0kgsd8qiqv/28367804042.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e79ca14eda---52937651670.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/jefekukor.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/92818259987.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=when+was+the+mcgregor+mayweather+fightPDF link annotation
    • 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://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/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_off000137fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FC 10932 bytes
SHA-256: 5dae1527a82732574af9fc7f424ff8ed807bc681263de9b96049074d94a4497d
font_01_sfnt_off0001513a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1513A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001694c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694C 19316 bytes
SHA-256: 2c804919517c35e0cd6e887c58037f5eebcc4dbc2b4e3deb1d174c70917585e4

Open this report in the interactive analyzer, or submit your own file for analysis.