Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1c27e3b312c72b…

MALICIOUS

PDF

101.6 KB Created: 2021-07-21 06:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 74ac152562bc46926f621a56244d1e79 SHA-1: 15c07b0f08b02cad96ff1905d02a347b6cae5a0c SHA-256: 6a1c27e3b312c72b615b87c26bd3fd5755b4123fa280c7467374a9efc9e8dd80
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL targets suggest a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b3a0a9a1a---wegijirinuwiwiwi.pdf In PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/fdbd85098437c9580547111490df0efd/55764388694.pdfIn PDF document text
    • http://ahchala.com/img/file/20998245987.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/6e76a962be5a054275ad7d94f2cd1d92/jakopolugo.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/91482651852.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/87323333263.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/mfso6edj0u4ul6hjh8hmk246i3/8744650641.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160be5bbb28513---kotemiduneviketameja.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/laxezurapojikupevite.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cfeba17f16e---63232505331.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/pupubujumupenezafugop.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/23788926864.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608140982a6cb---sobodazu.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b6c317d3b4d2aed34579e64e6c100611/bopobizowoguxiruxibed.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/69013518774.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bfj9l0ab8dfcjralh888umh125/2649939832.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/9u6uqv4j4oslhqnh5bd49mg8j8/37207278065.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/89126639548.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ef19a32b---fasusipojukomuxunan.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/92e020c62c8bfb1da67475cf6fe7214f/43111164059.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b48bbc63f4e---78744164542.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/neperokogoki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=mending+wall+summary+line+by+linePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D61 16648 bytes
SHA-256: 4d05e111638e29984dbe5df87790ef0a2fe03c7252f53e5fe6412b9345a11eba
font_01_sfnt_off00015887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15887 10804 bytes
SHA-256: c10e82980c57953db4357c0c210c2dbaf96204f947365bf580f94e8a43a722d4
font_02_sfnt_off00017139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17139 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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