Malicious PDF — malware analysis report

Static analysis result for SHA-256 42717759669ae119…

MALICIOUS

PDF

81.3 KB Created: 2021-04-02 11:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a0585da25711fc7256e1e32f6a5eadb3 SHA-1: 7a6bb509469467acf8c4bec702f3aa43e4d02ba2 SHA-256: 42717759669ae119a5deb6cb890a33e62b37da9151c14fa182ec0319dbd1bae7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The primary purpose appears to be SEO manipulation or redirecting users to potentially harmful content, rather than direct execution of a payload within the PDF itself. No scripts were extracted, but the PDF structure and embedded URLs suggest a phishing or redirection attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=jardin+botanico+catie+costa+rica PDF link annotation
    • https://vopupina.weebly.com/uploads/1/3/1/0/131070761/6dfaac.pdfIn PDF document text
    • https://julitigifoxa.weebly.com/uploads/1/3/4/3/134310533/pusefepaloguzidobe.pdfIn PDF document text
    • https://mufosuxid.weebly.com/uploads/1/3/4/0/134040625/relaj.pdfIn PDF document text
    • http://jonixumuxa.iblogger.org/juxazumalivijejutelo.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/wsvhaih/53881711182.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/hjZhgqv/facts_about_zodiac_sign_scorpio.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/bgcNjVU/1942_pacific_front_premium.pdfIn PDF document text
    • https://xekanowodupap.weebly.com/uploads/1/3/0/7/130739303/4827719.pdfIn PDF document text
    • https://cdn.sqhk.co/vebudirepo/hiUhaeT/popekirinelosuvutom.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/novezipitod_xowimaviwi.pdfIn PDF document text
    • https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/e5214c7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rovikibixu/how_to_check_transmission_fluid_08_g35.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/planet_fitness_member_cancellation_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/cleaning_checklist_template.pdfIn PDF document text
    • http://femubavavozemag.epizy.com/11448951859.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 4820 bytes
SHA-256: 0f0764200609973587998975736ee905085bf72ae5e5ae6c1fc6bfa3a77a6eae
font_01_sfnt_off0001022b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022B 11240 bytes
SHA-256: 3188b686c98fd26eecd81117c7d3b2b7fd117b3b22863d293701b4d58e076815
font_02_sfnt_off00012883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12883 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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