Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc767a81bf72b158…

MALICIOUS

PDF

79.5 KB Created: 2021-03-28 10:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6606d352e4530585d70fbde77f51fd5c SHA-1: 79af343782cc9905bb07e62bf589faed137751d0 SHA-256: bc767a81bf72b158e52491dbf588dfd3bce74df8bd07d536d5a32ecdd5294f30
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'soxebez.ru', which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, suggests a lure related to a 'wellness recovery action plan', combined with a download call-to-action, indicating a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/strik?utm_term=how+to+make+a+wellness+recovery+action+plan PDF link annotation
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/3f8bf82564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_605513c6f292a.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/does_aslan_appear_in_prince_caspian.pdfIn PDF document text
    • https://pefuwopiluja.weebly.com/uploads/1/3/4/5/134592541/5822777.pdfIn PDF document text
    • http://vanlit.ru/nawujewivutamapejumixaro2lop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426541/normal_6050dff105b9e.pdfIn PDF document text
    • http://community-day.ru/viduzusumoripeleni8y6x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455907/normal_603102e8d1bfa.pdfIn PDF document text
    • http://free-at.pro/how_to_fill_in_missing_numbers_in_fractionscycwr.pdfIn PDF document text
    • http://harmony-market.ru/bofejanukukogawyo278.pdfIn PDF document text
    • http://lamovingcompany.com/gaxovibazom6qn.pdfIn PDF document text
    • http://korsabarca.com/glomerulonefritis_proliferativa_difusaqjspo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419628/normal_5ff31d5b30a9c.pdfIn PDF document text
    • http://passive-income.ru/4766964534oy3dk.pdfIn PDF document text
    • http://vatamuvemazaril.sportsontheweb.net/oxford_basic_english_dictionary.pdfIn PDF document text
    • http://lynciguest.com/81107759266lwj2y.pdfIn PDF document text
    • http://daddytestit.xyz/spanning_tree_protocol_stp_tutorialzu4vn.pdfIn PDF document text
    • https://vademakab.weebly.com/uploads/1/3/1/3/131380849/d85469d012cdc8.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/bisapovepizaj/make_a_checkmark_in_google_sheets.pdfIn PDF document text
    • http://xedavabawavela.onlinewebshop.net/fefimuj.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/dilajusixifemoxirabajidan.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/what_is_one_example_of_a_nonliving_thing_in_an_ecosystem.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_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 5356 bytes
SHA-256: cacc3f324b5c8848c5e21b9faa0ffb5d7f007d1673d906ae39c85109eb3c3d6d
font_01_sfnt_off00010961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10961 10768 bytes
SHA-256: 79cc66cdf0c9f3d1940f7e9348e7cbef277b3e62f1d94a98d858159409da8b1a

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