Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b76ce33458465e…

MALICIOUS

PDF

71.3 KB Created: 2021-01-10 02:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d30abc12f5c83ae6c720ba19c5cb1627 SHA-1: 9aed3421176f8a7cceb37b44026a22020061fbcb SHA-256: e6b76ce33458465e7572992c45972c75c6911eca93965ab702dc1f26a383e5b0
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to potentially harmful content. The ML classifier and ClamAV detection further support the malicious nature of this PDF, likely used as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/aws?utm_term=articles+of+organization+llc+texas+template In PDF document text
    • https://posanawefu.weebly.com/uploads/1/3/4/7/134711745/7796b9.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/9422487.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/xiaJja4/translate_words_in_a_picture.pdfIn PDF document text
    • https://site-1234112.mozfiles.com/files/1234112/jugivudewedamalipogowesu.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/bieQl0T/tuwizezenunezosimogajimo.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/fogibi/mobifubuzajefutarus.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/raxuje.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/65164589970.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/bejepetixobozedo.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/bedtime_stories_for_toddlers_with_pictures.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_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 5440 bytes
SHA-256: 965eba39d15a66f9e9af969e606de40c612d67ba14983b87fe151760d54df054
font_01_sfnt_off0000eca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA1 10692 bytes
SHA-256: 9203563909e2f39af4b9683339ab62075cf8cb98f06bfcf3253f8a003e3cb12c

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