Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d780b59f44eaad4…

MALICIOUS

PDF

80.6 KB Created: 2021-09-11 06:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c39e69c039575d532ada5a3b02e9ce69 SHA-1: 6f9d51874af16a98d5dd712212f4ed02dd26aca5 SHA-256: 1d780b59f44eaad42c756cd9f82d1c0c0b20825491acaf8acf7d23d4c87db193
146 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple suspicious URLs, including one that appears to be a lure for software hacks. The PDF structure and numerous external URIs suggest an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://inwebjor.ru/uplcv?utm_term=euro+truck+simulator+hack PDF link annotation
    • http://riggi.ru/userfiles/file/34887266854.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/70230936839.pdfIn PDF document text
    • http://roleco.pl/data/aktualnosci_imgs/file/87475965357.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/nifalarejuzelumojugi.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c14e0568b2---76595051707.pdfIn PDF document text
    • http://cachnhietwin.com/luutru/files/61771656575.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/32559628787.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/pofenovefenojuso.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gudas.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/fawixu.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/96251628187.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613067d10c5f3---84080856831.pdfPDF link annotation
    • https://fsreloading.com/userfiles/files/73180342610.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/wisezokumodeluxuvi.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/gatujixodod.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379489d3601---redenumagurodado.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612fec3e289ec---vajibu.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/88042053649.pdfIn PDF document text
    • http://www.bandungmesin.com/file/salediniz.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/22973596675.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210910105203.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/vapanividijokidoluz.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/15796276497.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_off0000d7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 17420 bytes
SHA-256: 9b0ce283d095f61b6398568006925d2335206a42977b78865b1d8101673f0679
font_02_sfnt_off00011d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D29 10432 bytes
SHA-256: e5fe58b1101c6ea21c7688a77e3f78db705efd65eef2e88c5397664585c6fa50