Malicious PDF — malware analysis report

Static analysis result for SHA-256 208858f129477bf6…

MALICIOUS

PDF

87.1 KB Created: 2021-08-04 20:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b08d59bcfa61105adbc7e6fcda64b41e SHA-1: dc85d2e763abe4d85d0bfb1f507a88a153f3839d SHA-256: 208858f129477bf6a0b99b9a43950ad975745e7978abd3d8a4d1fcad6c096e12
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm suggests an attempt to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.asap-recruitment.net/upload/file/sexiputu.pdf
    • http://shosholoza.de/file/livirel.pdf
    • http://zjqzzx.com/uploadfile/file/2021071906075173499.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/2ac216c2fae54ca52327b9fff69656cc/fikolizafupabal.pdf
    • http://mrbossamktown.com/uploads/files/28997557945.pdf
    • http://vantaibactrungnam.vn/upload/files/batemexolixop.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/4e6e6d06c1fe2f790e74e1cbddc5e226/suxizokasuzilujajotop.pdf
    • https://bmat.mn/uploads/ckfinder/files/93712196597.pdf
    • https://greenline.bg/userfiles/file/vebixojivukexamop.pdf
    • http://maslag.eu/userfiles/file/80721467616.pdf
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/29695015037.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/n6mar6rqinhq25rnpongsrpuf7/81699365926.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1609a10325de42---83294729125.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609452f0806f0---56330131757.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e98078058---kiximefupijafiri.pdf
    • http://4grd.com/cmsimages/file/pujuvuzazimevidaj.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/1e3363035cdb969e5488ae200da30fba/93915525006.pdf
    • http://abogarestudio.com/userfiles/file/kipogatifejabuso.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608650e0eeb14---89664511546.pdf
    • https://otartufo.com/ckfinder/tartufofiles/files/84939026706.pdf
    • https://binarbaidrealestate.com/public_html/userfiles/file/botevoxumasakinonejag.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/215e632b0660571df95058d42c765340/nedeluwenakomaforasoral.pdf
    • http://maility.pl/_ADRESuserfiles/file/42441098747.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/0ab21b3516fa74b0b65da931a9945928/48988406436.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=bigasoft+total+video+converter+5+crack+free+download
    • 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_off0000e279.bin
3da5b66f6c51a652d10fbcba3c97c4ca0cd0744b830cb6e05167e62d51c69b45
pdf-font-stream PDF embedded font (sfnt) at offset 0xE279 11084 bytes
font_01_sfnt_off0000fc65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 16792 bytes
font_02_sfnt_off00011477.bin
d1813951af113987bea994cfa578603b881309cbec54f9ff838bd1abc83b3bc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11477 22384 bytes