Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c02ea6df6547ab1…

MALICIOUS

PDF

100.8 KB Created: 2021-07-02 00:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2713f92ff49c94a1a4aa5b2813d7890f SHA-1: 3dbadff29977ac259ec3c374e395f98e698a6c4a SHA-256: 0c02ea6df6547ab199c21ba44b66572bbcbe9628f9c8bfa5fd43f31ec3186688
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress sites, suggesting an attempt to leverage these sites for hosting or redirecting to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings supports this, indicating a pattern of using disposable or compromised hosting for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f784b3a79---gizaxasuvosokap.pdf
    • http://asztalosweb.hu/userfiles/file/18270879136.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/b58006b4aba31f4617106e4cc0b18ca3/11299619266.pdf
    • https://xn--nmqu14inmf.com/upload/files/megidumexixanilevufu.pdf
    • http://hainescentreasia.com/images/file/zijolubifose.pdf
    • http://compufoxmail.com/userfiles/file/93198829552.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fff397070e---30601601492.pdf
    • https://otartufo.com/ckfinder/tartufofiles/files/51674639510.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51d95cf1e4---10532889275.pdf
    • http://afgventuregroup.com/cfiles/file/topaninisogu.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078be4cc9bef---xatugevemejewubarefi.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbe75a6392---xubolireragisakazororun.pdf
    • http://kemmurad.com/webroot/img/files/43977845737.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cec79d8dd---bokurekosokemado.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/8f50c78ae875668476e96c83fe8fba5d/jaravevivusuzetoki.pdf
    • https://alshaabcoop.com/userfiles/file/faxubidixokox.pdf
    • http://kalkulacka-hypo.cz/userfiles/files/57180646550.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/dcbe10f885040991a1453c6859671bb7/rujamewijojezegewuredar.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/1i30nhqgsfrvkh11fsfvga2rn5/nibegemolirimodap.pdf
    • http://zrdb-drogbud.pl/Upload/file/pajavavegapesadobibade.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/fff5499ee1b0e1a315b9635cb97c8da0/fubinitudinapupitaxeluw.pdf
    • https://heatingboiler.ca/fck_upload/file/71008743337.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608dffc175736---61913207223.pdf
    • http://mosjob.ru/images/file/58284246177.pdf
    • http://turnyras.lt/Files/file/nuzosezemokufixi.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/29e9e1cecb90bbfc2070295a4b640a38/toramatefonobukoruses.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=worksheet+periodic+trends+answer+key
    • 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_off0001258f.bin
4ba2318b1eeb3929a59341b6365fd0bbd10d6164117709d68a7eabed2f4ce756
pdf-font-stream PDF embedded font (sfnt) at offset 0x1258F 17796 bytes
font_01_sfnt_off000154a3.bin
bea749db208879dd9a0875db30bf59812438795b8d6c6badd83e3be481b087cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x154A3 10852 bytes
font_02_sfnt_off00016dc6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16DC6 16792 bytes