Malicious PDF — malware analysis report

Static analysis result for SHA-256 5454f5361b9adf11…

MALICIOUS

PDF

73.7 KB Created: 2021-02-10 23:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a3cbdad30e851fc73c1caba0e70b64f1 SHA-1: 1f5507d699755368d4e115b0e5866021437bb625 SHA-256: 5454f5361b9adf113251ac94a0f42c171c7ccb250aa07c931679b45c08c52ad9
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on Weebly, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to reference a recipe, likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/123?utm_term=zuppa+di+pesce+recipe PDF link annotation
    • https://dadazifetulo.weebly.com/uploads/1/3/0/9/130969312/95cd89597b1.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/beromusevuru.pdfIn PDF document text
    • https://pimuvetu.weebly.com/uploads/1/3/4/6/134635596/3b473d7.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/hg7icUN/foxepewepoboziwapesulujod.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/Bjelro3/chocolate_easy_recipes_no_bake.pdfIn PDF document text
    • https://cdn.sqhk.co/salosegebomi/gQ19wif/diwowetoxuzipare.pdfIn PDF document text
    • https://binelotetite.weebly.com/uploads/1/3/4/0/134016953/ba960ac9beb7308.pdfIn PDF document text
    • https://viluvaxev.weebly.com/uploads/1/3/5/9/135974466/wawosegu.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/taguxif/yokai_watch_2_fusion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/gogadogajujad.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/xavajuzudu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/24849296111.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/obat_antasida.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/34180110994.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/mupemagakidosute.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/rofodufulekire.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/dekijutesewezesolora.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_off0000e43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43C 4992 bytes
SHA-256: a8210b25e38967c94ce4c6d752fbbc11d6fe0abb5406df99677b7bb6a031bab6
font_01_sfnt_off0000f547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF547 11304 bytes
SHA-256: 90186ebd3bfb64a3a40cfb44245f67706106687c113e474796faca95d5d439cf

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