Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe4d277d3f07761…

MALICIOUS

PDF

75.0 KB Created: 2021-03-05 16:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3e027a76cd14235971482ea93e683cd5 SHA-1: 10f0f0e2e8c50b0b711a5647fad7ff0dcb7d7120 SHA-256: 8fe4d277d3f07761dbde16816aacd4e2d57bd18679ce9a692b8656cdfede71cf
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 0.9993

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://druttle.ru/strik?utm_term=niv+application+commentary+psalms+volume+1 PDF link annotation
    • https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/kuwiv-sijegegiwemeked-pikuwotezi-patetoxesewo.pdfIn PDF document text
    • https://tabikajodunel.weebly.com/uploads/1/3/0/7/130739544/bumonime-kabulul-kataz-kigetetax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444351/normal_5ff8adc9d543c.pdfIn PDF document text
    • http://fodelogutejamit.getenjoyment.net/jeet_kune_do_classes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_5fdc4d3299943.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5ff8246641a1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5ff5be1d71f1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411915/normal_5fecf8ad22a32.pdfIn PDF document text
    • http://eurofamily.pro/calatlantic_homes_warrantyh2um4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459788/normal_600a05c01f789.pdfIn PDF document text
    • https://visigeporoxibus.weebly.com/uploads/1/3/4/1/134131572/6699441.pdfIn PDF document text
    • http://fuxanujibiz.mygamesonline.org/how_well_does_verizon_hotspot_work.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/67849653657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_6019109577c26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_6007ee15c4cc0.pdfIn PDF document text
    • http://paksorond.xyz/51061041692d285m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492278/normal_5fe24ea50d5c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408990/normal_5fe5da0365bbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426423/normal_5fe1ab30114d2.pdfIn PDF document text
    • https://mizavujubamu.weebly.com/uploads/1/3/0/7/130775062/vuwudefovamam.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/fobidiso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369327/normal_5fe54629d0b5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bugenerefajujus.atwebpages.com/2776178222.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_off0000e823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE823 5264 bytes
SHA-256: 2a88cb53dc2510aff5c8ea819e194ba919ebf9d181210df2889a05e43ae3692b
font_01_sfnt_off0000fa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 10592 bytes
SHA-256: 228444b8b1e805dc1422e58a67ecb19d72d1807d393c1b698059bcb54b20d247

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