Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df020b14dcc8dd1…

MALICIOUS

PDF

85.1 KB Created: 2021-06-28 00:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2877ae6ac4e1f79920aa3d3f08723f25 SHA-1: 28a13605e15bba72484dc026a4793edf0c58cde3 SHA-256: 8df020b14dcc8dd1d10b083806d4bb2e2e410d02f39d97913ae5d08ff4b5a7ff
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. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting. These links likely serve to redirect users to phishing pages or download further malicious payloads, indicating a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://bawaconstructions.com/editorData/file/9904162923.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/5c8u6ancm50ina31vbjgvi5p7t/dolasilomitulan.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c350aa55ceb---wadanagejoberevuvilomegi.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9f2010442d457bb78c1447bfd9f90ae1/podezodinozepulijik.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0af12208b1---fusobetizifugipiw.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/1d980dad7b252d1b3ed0ef9be68a3db4/77680925346.pdf
    • http://metabolit-plus.ru/files/file/mirurilul.pdf
    • http://galantemontagnana.it/ckfinder/userfiles/files/41064546349.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/usq26pct0mann7h6hi7ec8vish/79636833130.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607bc7efc48e9---gutateni.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ioqoo9ia063nrppp595qj0hu3h/sojegijej.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e17a9a7b8---kifavoxokimevotel.pdf
    • http://playbabydoll.com/userfiles/file/27735354468.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/i0lketq10u66fqdv8mp7thg09m/kenakadinigosiramijagi.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/kegefogigegilawebi.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f496d4f25---puvuvovusubobapoto.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/65058a36488de0e2d4135cf835312db1/7153297574.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c696e18ec4f---komesivijupodavagow.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ba743b52---jekose.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/bdaca2c1ae058c4e07807cf355f9dab7/tapidovagapemakofamoju.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e14ee3a39---64568424373.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/32cd16dfed745dcc22b7e415eb0ebad8/77135138928.pdf
    • https://arvikabc.com/images/uploadedimages/file/62475052018.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=remove+president+from+office
    • 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_off0000eaf4.bin
b3dad81683ed22f71b064dadc9a7d395045df6ba1871386a3d9786373c52409d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF4 16748 bytes
font_01_sfnt_off00011689.bin
3d22fece4ceadf9ef95032422860ddbfcce9035269aac0d9313a4cee4f3fe484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 10684 bytes
font_02_sfnt_off00012f0c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0C 16792 bytes

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