Malicious PDF — malware analysis report

Static analysis result for SHA-256 348590ab52fa99a1…

MALICIOUS

PDF

86.0 KB Created: 2021-09-06 06:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e27f502f64cfb45d8ccd6f14ebce6a3 SHA-1: a695f176c738dc592fd58a0e03c10605fb680dd3 SHA-256: 348590ab52fa99a17be6633ef25a32467a7e543274366704062f668855318431
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting services. These links likely lead to phishing pages or further malware downloads, aligning with the characteristics of a malicious document used in phishing campaigns.

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 https://laborke.ru/uplcv?utm_term=manuale+d%27amore+pelicula+completa+subtitulada
    • https://gulf-rope.com/images/bulk_images/files/3020346939.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/e84eb72bee0696beeaf6e643ed20d533/felozuti.pdf
    • http://sparan-art.ru/ckfinder/userfiles/files/96625526530.pdf
    • http://ciccioinpentola.com/userfiles/files/98080064440.pdf
    • http://masan315.net/board/imagefile/file/kozuvotodiwufoguvobiposus.pdf
    • http://cepsagibyachtfuels.com/images/photos/3141166494.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bf91b4223---31983398807.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/btl3dvtjm5k2m1esojfi2rma56/pefijod.pdf
    • http://0-50.ru/userfiles/file/safizaxadowenolodadaw.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076115422efb---67420405584.pdf
    • https://tungqibiotech.com/upfiles/editor/files/52550342815.pdf
    • http://cucthongke.vn/userfiles/file///lolelegebuvibonine.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093f8273bb98---bosaw.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc30475387---xapisivepivibufikub.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/250b80f94af31bca6833ae690e585a48/xizewosodekuji.pdf
    • https://tiklatakip.com/calisma2/files/uploads/85709262634.pdf
    • http://growourworld.com/clients/83159/File/708991718.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/ff463bfb108d3f7639600f2f109438de/dipisedugokagozimawifa.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16133f1b8c0bbe---59968126397.pdf
    • http://modnyi-buket.ru/uploads/files/vusuba.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6b6d5dbb---jivivaxej.pdf
    • http://ccspevents.com/clients/24998/File/80685811438.pdf
    • https://wronba.pl/uploads/wysiwyg/file/47415006511.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe484aac3f---mizufabevefagulanam.pdf
    • 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_off0000e5fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 16792 bytes
font_01_sfnt_off0000fe0c.bin
59369fa13d026d8837d8fc1b66ac982387a231133042f066e8b7282c51d78fbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0C 19496 bytes
font_02_sfnt_off00013079.bin
5e2d5de6eea256d7a364ee9e0c3cd96e9d398a3dc516d94cb2a0c56ed631e391
pdf-font-stream PDF embedded font (sfnt) at offset 0x13079 10940 bytes