Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e167df906d9bdd9…

MALICIOUS

PDF

82.4 KB Created: 2021-05-05 11:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 85265b66e2657624144fa09b92745248 SHA-1: 737cf115b1c6fb19ea4a5932045e1d5b536d09bf SHA-256: 1e167df906d9bdd9bb4d52d1ec53aa9cfca2c874ce9f38bb90d123216c0656ce
214 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or spam campaign, evidenced by a large number of embedded external links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the document's structure and link farm behavior suggest it is designed to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://crophysi.ru/strik?utm_term=how+to+reference+online+sources+in+apa+format In PDF document text
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/dc1ab.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/5efb5200d977.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/5853290.pdfIn PDF document text
    • http://gutuvilobabolor.iblogger.org/badifelovafixofogiro.pdfIn PDF document text
    • https://labafapagitef.weebly.com/uploads/1/3/1/6/131637364/jimabogavodukap.pdfIn PDF document text
    • http://fadekitexef.iblogger.org/myers_briggs_personality_types_explained.pdfIn PDF document text
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/e38fe0.pdfIn PDF document text
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/rurodatam.pdfIn PDF document text
    • http://pekokaxa.22web.org/zofulav.pdfIn PDF document text
    • http://vuxijagodoku.22web.org/62438135025.pdfIn PDF document text
    • https://kogababofaf.weebly.com/uploads/1/3/0/9/130969162/sijab.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/vavabi/atharva_imaikkaa_nodigal_images.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/answers_to_tesco_application_questions.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_e4a147fa7df54419b710c3e5347ea948.pdf?index=trueIn PDF document text
    • http://tiwumuni.epizy.com/82188229634.pdfIn PDF document text
    • http://savejanaxejov.rf.gd/dulatetovajaxolima.pdfIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_47bbf3bbfdb246ff951aca972f41c214.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/towakog/67902436063.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/33757562316.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/displacement_reactions_worksheet_tes.pdfIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_5fcee9cb8f7f425d986d680ace04ff69.pdf?index=trueIn 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_off00010456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10456 5212 bytes
SHA-256: 483c3a70bb57678a2cfc2534f3f11aa31086825ebb7fcc4f566d199f809cfde4
font_01_sfnt_off00011613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11613 11196 bytes
SHA-256: d08942acfb68a23a1caae1465ef1f4331ed5446258fdcaf596c16a2d50410baf

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