Malicious PDF — malware analysis report

Static analysis result for SHA-256 254e0bb12a5bf647…

MALICIOUS

PDF

83.1 KB Created: 2021-09-05 00:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 94b57f2d422a799200b4d58cc046374b SHA-1: a65793aff18ab302c81d9397c97a09c8abd0f8a0 SHA-256: 254e0bb12a5bf647eb951120ce5423ce32f8df09b7436857c296cba7fd3c8365
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload directories and disposable hosting. This suggests the document's primary purpose is to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/b222l9s3ok6vvvr7jvqab95ds4/79088261373.pdf In PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/74c99df19391fd06ede14e99d8299688/kilufojibojomazapaloj.pdfIn PDF document text
    • https://dm288.com/slicice/file/45974256272.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/dupira.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/34810170918.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210818035415.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/zurisesunezitexaguzanet.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/paxaxax.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/xufiduxopiboralenef.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160812a676a572---51330058744.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fb462c4ea---wipoxa.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/xelububuxafit.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608102b136a89---44187923289.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160795169520ef---degopevitamivizumuku.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6b389bab5---guvuxasol.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722f307872b---23019134394.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/79338127269.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/a84c31606350753448d56cefe1908396/80855787197.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/61333001693.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08c031799a---rixokazetof.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f48e7a1d---bizovajusariparidiri.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/i39ahjljsbaktkj5is0c91te3u/lamewexenexapuwe.pdfIn PDF document text
    • http://poorclarescork.ie/images/51963279592.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/8575354895.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210829015409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=psychological+effects+of+violence+pdfPDF 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_off0000de6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 17956 bytes
SHA-256: d8eca90ab37404ada27f0e0f3ede6f892645c65f99cd80bf34b26ebca8960d0b
font_02_sfnt_off00012514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12514 10980 bytes
SHA-256: 95231e9bc38c39166c25d09f48e8141ad1a709011df95275b5994495126a6e3f