Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e8eab371d7636c…

MALICIOUS

PDF

83.8 KB Created: 2021-05-24 13:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 51b7e2cc0c04eb9ee3a7a83e38323373 SHA-1: c24e864e1679e446a3b004878fdfabea2a93c3db SHA-256: 10e8eab371d7636c6927b8db5f981a200f36449bce916bbc7f346989c6f65d2d
196 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users to potentially malicious content. The primary redirector URL is https://resalured.ru/strik?utm_term=what+does+444+mean+in+christian+numerology, which is used in conjunction with an image lure. While no scripts were explicitly extracted, the PDF structure and the high number of external links strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://resalured.ru/strik?utm_term=what+does+444+mean+in+christian+numerology PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388181/normal_602f7b1d06491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_60115849192b1.pdfIn PDF document text
    • https://rekoxexegatetun.weebly.com/uploads/1/3/1/4/131452740/nugawipazogesobetete.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/lilefigijarofo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375080/normal_5fe2b05e6c38a.pdfIn PDF document text
    • https://nigupuwifiva.weebly.com/uploads/1/3/5/3/135329906/7797389.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/lofupipub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5feb9d5f86b95.pdfIn PDF document text
    • https://keziraxese.weebly.com/uploads/1/3/4/5/134576249/4361613.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369794/normal_5ffe1b3535b3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455374/normal_600324d34dc19.pdfIn PDF document text
    • https://redutoxaxijarow.weebly.com/uploads/1/3/4/7/134760413/3848424.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://s3.amazonaws.com/fovezewi/rulufexoruranoze.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/woh_pehli_baar_full_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/60723622101.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/4th_grade_math_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/sewaxubemiveluti.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/additional_insured_endorsement_form_cg_2010.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8D 5440 bytes
SHA-256: 2652d71c7e0ac58aae10c6c3c87825d917a3a7d92a3fe5664efc2b5033b0e30b
font_01_sfnt_off00010ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFA 10644 bytes
SHA-256: 125a6601a4e674b4c590d492fa5131727887fe27e0ef33397f6e80595071efd7
font_02_sfnt_off000133e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176