Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cb477b499c8fc0…

MALICIOUS

PDF

81.4 KB Created: 2021-03-14 13:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 338776c0289a65e469e3a3dea2f1b859 SHA-1: 50f8413523777fafbd241bf6fdca383478556812 SHA-256: e3cb477b499c8fc068b709a63c42eadb3694bbaed6154905fbe249d07a02a3fa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dafemum.ru/award?keyword=synchrodestiny+deepak+chopra+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fcceed230fed.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/6214577.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5ffb125e92411.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495550/normal_5fc9be69e307b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373271/normal_5fffebdd62695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_60372b7190a57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472760/normal_6003bdd132617.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_6002d4099fc13.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/kobexepawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_6041217bbb4c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375887/normal_60072f0b7c223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498883/normal_60476aea86565.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/535b11e6-c370-49cd-85b0-384859448481/tapijizamebuzo.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_879104125bce4080a86a4283839b3d4b.pdf?index=trueIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_024b9d985e504d7bb79ed407d8615492.pdf?index=trueIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_4c64665a49c94b9594d72f58ec7e8fd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/298d202d-59ad-4066-bce7-68bd552c2018/heil_gas_furnace_model_numbers.pdfIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_8c40cd62d2ba41cca775b438603b7e91.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CC 5268 bytes
SHA-256: aea76306e6f5da5764e916ff0ae0b97a781939984abdf51dc2a7d8904b7d5781
font_01_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 11096 bytes
SHA-256: 69f244677a9943bbbabd6c858fda5cabe711a8b6f1562e1374ba7e1019221596
font_02_sfnt_off00012840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12840 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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