Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab7099d24982b33…

MALICIOUS

PDF

68.3 KB Created: 2021-01-27 00:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 429d1cc6f1c30c7985f9451072f34677 SHA-1: 34db8d841b88038a7ccc959bb04200a8a4046e40 SHA-256: 1ab7099d24982b3372133602a7ee924a03067a5c6e8886adb987acf93325ad64
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with at least two identified as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of links to disposable hosting and known malicious infrastructure suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=truck.%20io%20mod%20apk In PDF document text
    • http://lajulufubugo.22web.org/ki_bikini_body_training_guide_1.pdfIn PDF document text
    • http://lasomupigo.iblogger.org/joomla_3_bootstrap_4_template.pdfIn PDF document text
    • http://mevilesiroxivo.iblogger.org/watolawamapenekarexu.pdfIn PDF document text
    • http://joxorapux.22web.org/59234738836.pdfIn PDF document text
    • http://dasuwupozu.22web.org/nidoti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/ameloblastoma_ppt_free.pdfIn PDF document text
    • http://wivipazipe.rf.gd/lava_you_ukulele_chords.pdfIn PDF document text
    • http://pidusuzelaju.epizy.com/dupebokudiligujuvofun.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/jefojogirarig.pdfIn PDF document text
    • http://nawexox.epizy.com/wuduka.pdfIn PDF document text
    • http://vadawowugozopul.epizy.com/ccda_official_exam_certification_guide.pdfIn PDF document text
    • http://ramufezumax.rf.gd/erased_2012_parents_guide.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/sofiwuvimap.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58C 5056 bytes
SHA-256: 8d733be4448fa9e97e8a17725e85773ea0f376577d7396f80ca14499956ea676
font_01_sfnt_off0000d6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AB 14144 bytes
SHA-256: d61955c8c9bab24907a1381b67ca28fb9efc7ca1b529cfd6541ae9db51ef71a0