Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab7b8b06cfe3b34…

MALICIOUS

PDF

69.2 KB Created: 2021-10-03 19:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 92eb29d60279fd772894412d3f726e9b SHA-1: ef2e3e7eae9686df447382f4a032cbb326beb5be SHA-256: 9ab7b8b06cfe3b342023f74462c5809c74dfdbeada0964b85ddfc8821654bb57
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress upload directories. The embedded URLs, such as 'https://huntic.ru/uplcv?utm_term=filmywap+2019+bollywood+movies+download+hd', suggest a lure for potentially unwanted content or further malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://huntic.ru/uplcv?utm_term=filmywap+2019+bollywood+movies+download+hd PDF link annotation
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614405e77ff58---55232794486.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/12319420018.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/masuzisikake.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/lenudobetesexalim.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/76474789888.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/66639892960.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/70970875194.pdfIn PDF document text
    • https://mimpishio.com/contents/files/51712440711.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/72662130483.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/tefatuzatituru.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/62465912461.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614090af5c76f---75586859558.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/devitibedopud.pdfIn PDF document text
    • http://esteticka-stomatologie.cz/files/content/file/wakadaru.pdfIn PDF document text
    • http://idcla.net/upload/files/31102837749.pdfIn PDF document text
    • https://demo-universal.order-pro.com/ckfinder/userfiles/files/gilekafi.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/kufaj.pdfIn PDF document text
    • https://forumsevens.com/images/file/73372623955.pdfIn PDF document text
    • https://interconformity.ro/images/file/62547669668.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a6c0d6f6ca3b1ff59f7601b3f40d8898/11696439134.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/xegatowawoguduzex.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/xegekejanotolumaliji.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_off0000ae4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE4A 15236 bytes
SHA-256: fdf76cf1c71df0585a1e7734cb9d3de48a2952f47d1a528a53bf7aab583b6573
font_01_sfnt_off0000d516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD516 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 11304 bytes
SHA-256: c26c92c58c4b292c2070c0bad1dcccf3f9277ef979a477a4cc703a8e76588758