Malicious PDF — malware analysis report

Static analysis result for SHA-256 2887dba920d297c5…

MALICIOUS

PDF

116.5 KB Created: 2021-09-16 23:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4c2c05abca92466d55b83c2a94c78291 SHA-1: 96d877cb1c84641af42b9d4263536f6019c316cf SHA-256: 2887dba920d297c50c8b9bc984752518c0ef9db6f0a0f445404eaaf59c11b350
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or delivering malicious content. It also contains numerous external URIs, including one pointing to a raw IP address, suggesting it is used to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=ps4+gta+5+cheats+phone PDF link annotation
    • https://resonanceacteurs.nl/userfiles/file/52688174801.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/xadimadoxi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/39004116314.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/50262722703.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/bowaxijusosogamelel.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/xufoliminapixidelapeliked.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/zewerirulozofewitu.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/3236533601.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/95802963605.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/juwuzegow.pdfIn PDF document text
    • https://fuze-pay.com/ckfinder/userfiles/files/82206939000.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/47753377957.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/lofijekig.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/dutufexo.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/984d74005f88963f3d8fc593399b375b/vimirujasofarofexoda.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/97602772836.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/51460494566.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/basopinim.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/kugerimo.pdfPDF link annotation
    • http://vinmexindia.com/uploads/rifozewapemusunetizijod.pdfIn PDF document text
    • https://pr-dienst.ch/file/lululujo.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/pewubamulufitik.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210907_C81312153330B773.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/sulonuladivimemewalejula.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_off000162a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AB4 18908 bytes
SHA-256: 7b5324f42f75f0fee90ee19031055c2a39b6974acbc80b8ae4709ade85d2e819
font_02_sfnt_off0001abf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABF7 10628 bytes
SHA-256: 10ad83ce088a98c8b1c20b4733dc6b5fcc37545b725628f2a39cabdeda7a9351