Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51f2c3f1633c856…

MALICIOUS

PDF

89.1 KB Created: 2021-06-26 21:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d898b2ee615b69f58b19fcff16c7d618 SHA-1: 1c155be4f54870b695c7d39e0ee69094324e2ff0 SHA-256: d51f2c3f1633c856911ad9ccc99245964833324ecee2acf57bc904c6c892c091
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The document contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'cmd5evgnlifo8t5grasikciaav/jetemudokelonen.pdf' in the document text further suggests an attempt to execute commands or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://pistant.ru/uplcv?utm_term=how+to+fly+with+elytra+in+minecraft+in+mobile PDF link annotation
    • https://muzeumkonstancina.pl/attachments/file/2086159662.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607683ce63044---diserajonerudopoxepos.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f79af52ac0---pedetiluvufuse.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/44834887736.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e89b6073a---kopisi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/dasubodipujakexetubidaxi.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/8b2253b5812f15a5264b97d49fd53bf5/90282212038.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/51a03659ad638e1c2230c704532ec376/bawalewagigi.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608e59bc272e2---wedeluwuf.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abeaef39478---funibitemefuxubaru.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f70a21663b---23636268555.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/vl3hm7grdu30n8bn1hj9p9g8c7/kexixifokamadizozubarat.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/95187377312.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/cmd5evgnlifo8t5grasikciaav/jetemudokelonen.pdfIn PDF document text
    • https://honda-otolongan.com/upload/files/gafamujixajufu.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/difllb8ddoivpgso9pagl5aup1/61033812357.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7185b5227---folorekezidufugag.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a1e4f684c78213e955d77ee807f27364/74027418217.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc10211068---79057597235.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae232e7111c---zoraxuterarurezona.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/195256253.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

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_off0000f67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E93 10764 bytes
SHA-256: 6ef76e31d9120e09d4a70e579656a7e673651be656557016b287a6c78b66834e
font_02_sfnt_off0001272a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272A 18324 bytes
SHA-256: 08c35e7ff37ba5b48527bd1d8b15227906bda2daf1c87482cf7e1d9dc43cc309

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