Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ebf0af09f537e1…

MALICIOUS

PDF

78.0 KB Created: 2021-09-05 00:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1504b27a64f799bee014031f49a1c3e6 SHA-1: 2b5adcbb305e58c237e189c9b34d4cebf3fec646 SHA-256: 92ebf0af09f537e11aafa683bcbe3fc923001deb1389aee4706a51740f4cfa1c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, characteristic of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/gasesonisavenuno.pdf In PDF document text
    • https://robert-zauer.cz/userfiles/file/14793074068.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160fde8bf07ecc---43620384282.pdfIn PDF document text
    • http://longhornrings.com/clients/0/08/08da48574b41509ac7bedcf2500dc652/File/86027245343.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/34db04f9687b4356c4d552683254fc8b/74549362557.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/zopovemote.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/dusuxenofe.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/bokuvefow.pdfIn PDF document text
    • http://ezibra.pl/upload//file/fagosoxazetuse.pdfIn PDF document text
    • http://veivel.com/userfiles/file/26725562758.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/19389496273.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/ccdb5fed467e06dbf99ea1107111d12d/govibawozetonomixifen.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c2e220b71265e69aec4f75c2f0e94546/sixetevof.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/19177312170.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/pejajuvizabasa.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/11254588484.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d44f56e21---nevamojedofefel.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/soxanaboduguvavesi.pdfIn PDF document text
    • http://schokobrunnen.com/idata/tuzutujule.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/fk1drv9ivo97175rju3i8phl10/15845982608.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/dd6f7a756af8eae1fbef6d0dfb89558f/89102185577.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/148cf169092b78c1abb683aa6b99addd/68277708758.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/45602315857.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/56533571133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=first+conditional+exercises+pdf+a2PDF 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_off0000c9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EE 18456 bytes
SHA-256: 7ea9357fe0ca1ee6f077eada030149038657d329beddb428b10d296bf6c456d3
font_02_sfnt_off0001119a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119A 10812 bytes
SHA-256: dcebc527141b22a4622ce9c462ddaf37b99c0949523445402c19c325ad7db0f5

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