Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5505a7b5d64bc0…

MALICIOUS

PDF

81.1 KB Created: 2021-09-08 13:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eb07adf033013529e363ca0ba724d91a SHA-1: b2d18049f6dab43c97ad40fb08b7bda61b2b2b04 SHA-256: aa5505a7b5d64bc064334cf9ab87a45a6acb663edafce9092c8aaee4c38f6272
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, many of which are structured to appear as file downloads or content hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a network of links on disposable hosting, a common tactic for distributing malicious content or conducting phishing campaigns. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://allytemp.ru/uplcv?utm_term=2007+jeep+liberty+manual+transmission PDF link annotation
    • https://chogmai.org/ckfinder/userfiles/files/59048227233.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/welemitonajaran.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/42029581093.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/91305018770.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/jesixidawabex.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/3450773676.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/xagix.pdfIn PDF document text
    • http://safarang.com/basefile/files/jijatuz.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/24487917704.pdfIn PDF document text
    • http://it-hair.com/userfiles/dugukubejawofanolesi.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/62735072774.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/50139818711.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b88da9785---xolujak.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/fiwuzawivadipixonuxaviv.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/kozugeverubiragogonigotud.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/wexoguxak.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/tumuserizemurev.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/zanusikipasolije.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/bavidid.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/gisomazasavag.pdfIn PDF document text
    • https://linardi.ru/files/file/55185217208.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/fuxamojosagaragudanuwedu.pdfIn PDF document text
    • 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_off0000d651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD651 17652 bytes
SHA-256: c350db2fad93704809db300cfcd1d5b247438a422341b136a1513316812474ea
font_01_sfnt_off0001047e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047E 11092 bytes
SHA-256: 70addf19b9d216f3e254a914042ec7c2489a09eacc1d2e4e449807ad715652b7
font_02_sfnt_off00011e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.