Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c0b88456c09796…

MALICIOUS

PDF

67.9 KB Created: 2021-03-18 17:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 68089588be3414ae45fe3b38af756ffb SHA-1: 9e54f011d0b90224a01d9794ff7ef1b615e70a44 SHA-256: 70c0b88456c0979668a81194512467a0fde0caafae35c1ea69e0a055f51ea46c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, with the file being identified as a phishing trojan. The embedded URLs are likely used to redirect users to malicious sites or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=letter+of+honorable+dismissal+template PDF link annotation
    • http://vsspb.ru/guvegons5ji.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/iajcgjO/50204092003.pdfIn PDF document text
    • https://cdn.sqhk.co/taxotuzu/hhh9hdj/jubegajuriwik.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/5599557474780zqm.pdfIn PDF document text
    • https://goxutulolikum.weebly.com/uploads/1/3/0/8/130814421/566a4b606.pdfIn PDF document text
    • http://antileqphh.site/hockey_shooting_drills_for_beginnersepl46.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/jirix.pdfIn PDF document text
    • https://sazopugewado.weebly.com/uploads/1/3/1/4/131453094/toxatixabuwe-woxumom-lobima-wugofepidafubex.pdfIn PDF document text
    • https://wifivarar.weebly.com/uploads/1/3/4/8/134887990/4887338.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/euGjcpH/easy_pumpkin_pie_recipe_gluten_free.pdfIn PDF document text
    • http://iciapp.xyz/why_is_economics_important_in_healthcareqt65v.pdfIn PDF document text
    • http://theandyhong.com/3533041343rn8lh.pdfIn PDF document text
    • https://vidijizuv.weebly.com/uploads/1/3/0/7/130776341/zodulugol.pdfIn PDF document text
    • https://gufuvixenize.weebly.com/uploads/1/3/5/3/135387571/9561943.pdfIn PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/1309222.pdfIn PDF document text
    • http://vipogomer.iblogger.org/jelasitadijuvibukosib.pdfIn PDF document text
    • https://cdn.sqhk.co/buwowunuras/dDhhfMv/nazasujalip.pdfIn PDF document text
    • http://visiblawty.com/black_and_decker_rice_cooker_plus_16_cup72q2k.pdfIn PDF document text
    • http://storedubai.shop/79110501053pmj6p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vibakiwijikilok.rf.gd/appareillage_brique.pdfIn PDF document text
    • http://ziwejozaz.epizy.com/update-_alternatives_auto_vs_manual_mode.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_off0000ce5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 5364 bytes
SHA-256: e544bd24643aac56138d407571b88900ba7feba589a9ef173d8e420a33dc9b38
font_01_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 9952 bytes
SHA-256: 812f818517d733524408e67e4b0d3c207af1441dbc4550ff20d16efdb9d38bfd

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