Malicious PDF — malware analysis report

Static analysis result for SHA-256 abed0ea9f81eb4c8…

MALICIOUS

PDF

84.3 KB Created: 2021-09-05 17:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a6e1ee293395dcecc2a5498792348b64 SHA-1: 52279691838ced5a4fbafff02fe037751d63e49e SHA-256: abed0ea9f81eb4c8a336f27a5a2e45e77708e87d8faf7825fa7cdb0df56d47f5
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs, many of which point to unknown or potentially compromised domains. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the true destination or to engage in SEO manipulation for malicious purposes.

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://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/lodumovawe.pdf In PDF document text
    • http://ahknchem.com/upload/files/pujudazow.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/vexufadurew.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080520fa83d5---pexuxadiliwilufuse.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/b8099e7f5954772d218c4074d1c45925/56267656565.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/mubanub.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/04afc8b07280242a3b059ca3d8b62478/1486876859.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/retapulovibesovagunuzejif.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/detozopojeragiropugulibo.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/lalinutovusa.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/94c768146253bfa4e0ae0aa98279bcb9/nezudamozevale.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/e81jug03ha5npbp8pmgjnllele/xotoxuta.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ff7d9f29---26511356874.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d59003d54---muwexuromaju.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7ab3iogmr3vkjok6s7l5u16g8m/84791154983.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071c194f0cd2---basilamafekebux.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/menupuruvonene.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/9813f2781b2fe1a32ef9585b9209ebe3/ponutowogezup.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090382dac6d5---65425344685.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210817012831.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75040127679.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/26918551021.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/eie6os1q8336kohbor44gusdnb/wetotavilopasufevexovelaf.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/29396454308.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/18929759715.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=possessive+adjectives+possessive+pronouns+worksheetPDF 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_off0000e1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 11040 bytes
SHA-256: 1a2bce0cf581bedc8ec34e1728cbe9e2352f693cbaff8f6b669a76c6d73c3cf8
font_02_sfnt_off00011376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11376 18516 bytes
SHA-256: 95170defaa91ab58001c48cc4596a2f9b7add419f16d58853569dadd1ceebf42