Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d0fca79fb51052…

MALICIOUS

PDF

101.4 KB Created: 2021-07-15 15:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d214c2eda9719824159100d8d8acdce2 SHA-1: 135fa26ee38b903a557d11a7aa95c58e9848b197 SHA-256: 80d0fca79fb51052fb4882421fe911f36caaf3c02228c93a4d19a4b25a0b75bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting. The primary purpose appears to be SEO manipulation or redirecting users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sacoorhealth.pt/site/upload/file/bodipibipumobu.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b5u6qcjnblhl9ceh4sju8fdku4/lelopozafigipebuj.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/jagoxozizuk.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/4s5tu7ehqgk5r967ubjpgjpha7/66398696702.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a2a8b17e7---domawuzona.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/ximojizituzupagu.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/2160ba34cc8774906ffdfc2ec04b4662/49666989678.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608251bad60c7---22001584323.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/97115874675.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/nixepaponafafure.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/suneludamepirerudezozobov.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/bajabajivoleku.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/fuvunuzuj.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/dodosuvesigoni.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f24fa0e065---jopudegomidarisitaru.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/mokuliximiragodog.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/juzovisewebe.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/emgcgf94i2t4daqub8kmu6o7rq/12001834164.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/961b4e4e7b73bbc2e97cff0208192215/lasegagodoxifaxosevisi.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/1cnul5qigm7v3ufg9ndn14ia7g/jedijixobeselarixumopogus.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/14730410713.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e4d3349dc16d54c2c062bf573291292/vijomubadeseted.pdfIn PDF document text
    • http://tragadsonisurat.com/ckfinder/userfiles/files/173277458.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/xoliwudekinoguzixona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=vehemently+opposed+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 2608 bytes
SHA-256: cce1ab9dcf69eac2ad718391bed2d10ea1a2b3f6318306dec211ce3668501070
font_01_sfnt_off000106a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A2 22092 bytes
SHA-256: 2d69ba4bf5bd5a86dfecf4935d0a0c9a36cda10cfe83659f4fe724329ad021de
font_02_sfnt_off00013ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDB 16552 bytes
SHA-256: 0f6397a47db42f8d7d1c464c8ae5ba9b524c1af800dd8563630af7b5e0599640
font_03_sfnt_off000154fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154FA 10820 bytes
SHA-256: ce87a9828ce1ccab1dc01ef77e8287864816ba37677559696f43764f07feb02d
font_04_sfnt_off00016d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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