Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1646b260985630…

MALICIOUS

PDF

78.2 KB Created: 2021-03-01 13:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 90ddffa9d6d636b03b768166c783d85a SHA-1: 13069092a1d62c88fdffbcdaa9c5b0e818e6afab SHA-256: 4e1646b260985630fc3c79d0eff28f4c358729597c5e8b1c2ce0012d8ba6776c
166 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains invisible links pointing to suspicious domains, such as http://ig-supportcenter.xyz/common_core_math_worksheet_3rd_gradedelzk.pdf, designed to trick users into downloading further malicious content or visiting phishing sites. The document also includes external URIs like https://jacksth.ru/123?utm_term=how+to+make+fundamental+analysis+forex, suggesting a broader phishing campaign.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jacksth.ru/123?utm_term=how+to+make+fundamental+analysis+forex PDF link annotation
    • http://mawosatejojeka.sportsontheweb.net/pamudanesajatuxodowe.pdfIn PDF document text
    • http://dkblogin-de.best/sales_follow_up_call_script_template0o9uk.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/kx_85_price_malaysia.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/92182477731.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/the_merchant_of_venice_themes_sparknotes.pdfIn PDF document text
    • https://mogiveruxapexi.weebly.com/uploads/1/3/0/7/130775775/kufiw_vinopag.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/5058203.pdfIn PDF document text
    • https://bipewajebij.weebly.com/uploads/1/3/2/7/132740639/kamozuje.pdfIn PDF document text
    • http://xetudevera.22web.org/fovamu.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/madabonifexunejuwan.pdfIn PDF document text
    • https://ketevifut.weebly.com/uploads/1/3/1/4/131453005/5089475.pdfIn PDF document text
    • http://lisolu.org/51757945965zfujf.pdfIn PDF document text
    • http://ig-supportcenter.xyz/common_core_math_worksheet_3rd_gradedelzk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nujafosedoke.epizy.com/fronius_smart_meter_50ka-_3_data_sheet.pdfIn PDF document text
    • http://dozudaz.epizy.com/autosketch_mod_apk.pdfIn PDF document text
    • http://dofusuzi.epizy.com/graham_hancock_america_before.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/tojivakogegasovafobinafon.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/billboard_2018_all_performances.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_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 5340 bytes
SHA-256: 244ece9709c1110453ada0260f90d3377a537463d2e111eb7f76c182b99e2073
font_01_sfnt_off00010495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10495 11660 bytes
SHA-256: eb7aadda35b557e5818c81b53c62d3e65a00e333734e229163d8b46e920e05c8

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