Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70720edfcf1c286…

MALICIOUS

PDF

70.4 KB Created: 2021-09-09 11:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: abea51dcb30ed6e541b3f2453f285443 SHA-1: be1b4a488d9174d57d80787f9764a173e4c03986 SHA-256: a70720edfcf1c286b4ea2a61ee01572f8541114d6703e00630fa4c883a348aa9
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://apra.pl/files/file/34516043956.pdf In PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/84165208903.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/79704498093.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/fudebapowokali.pdfIn PDF document text
    • http://446888.top/userfiles/file/49024834246.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/9761863661.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/fibufagegesaderojono.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/votosonixov.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/58803026132.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/mibukotujixozifowil.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/zavavilakiwamawenir.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/81266050520.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/21890672181.pdfIn PDF document text
    • http://guchen.ru/d/files/56673313913.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/29335468788.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/tanepamifevixip.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/wujenilomarow.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613255697f280---mikewojoguvowewuz.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/49460784938.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/zawopubowotumixu1631037791.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/81153653176.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/71205466266.pdfIn PDF document text
    • http://chongros.com/userData/board/file/69611946280.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/22091955329.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=world+map+latitude+longitudePDF 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_off0000b2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFE 16080 bytes
SHA-256: 624e078685f120c5372777d6ebd46977b07c3f367542c7768494a518fbc72692
font_02_sfnt_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 10660 bytes
SHA-256: 45cf04cf5d170fb5201356df91e7e8b881522c616d92e563a65ecfa4240e4187

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