Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bc1232290704c4…

MALICIOUS

PDF

83.2 KB Created: 2021-09-08 01:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8ab9d37330f8ac90508ce4f6461e59d7 SHA-1: 0c212a38abaad1adf159606ffea4bd56ccc3e78a SHA-256: 80bc1232290704c40fc855875cb20c8ab9061c8c7f60745c2a6c70d6f970477a
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/da53a18b0df92521473200d49444f568/refadazu.pdf In PDF document text
    • https://mimpisiluman.com/contents/files/livitedogikevixakaloteki.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/81342615401.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/xizasogawagizizom.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/87849240093.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/1657418969.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb1f6890c5---71812538612.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/6872176825.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/14458055328.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6441ec2a41---27269201834.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/kewekuromeninawi.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f54ebb2a49---86025778685.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/basivokugasisarit.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cddb857b9---lupoludomisak.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16131e26f1707f---luwilosolosilakop.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/11985208941.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbe3f06dc1---vuzugejunoworu.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/2740665384.pdfIn PDF document text
    • http://centrumbiznesurawicz.pl/userfiles/file/pobemivogere.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed0ca2b8ed---kifotexogidelomebulesameb.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/63247055752.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/46745555773.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=siyasi+makaleler+pdfPDF 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_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 10616 bytes
SHA-256: 99260f931fc2eb95d9955464c8b08512945d9ebfedbed33d9f1c3df155ef28b4
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB2 19608 bytes
SHA-256: 66088fc4253dc362d6b7f240f597036f8c636fe3a1a993920148f7fff4fac5c0