Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffba7f95db8e3e5…

MALICIOUS

PDF

73.9 KB Created: 2021-02-27 14:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9af7cc50b5070be45ffa3bd0cb04a41c SHA-1: b1a9d912720615284185ec786f20deb17c04bc08 SHA-256: 7ffba7f95db8e3e5a037f12a75fe36a671b19296494b60efc0c2bf895aa9664f
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to a malicious website. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL `https://jottigo.ru/wix?keyword=world+at+war+apk` is the primary indicator of the attack, likely serving as a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://jottigo.ru/wix?keyword=world+at+war+apk PDF link annotation
    • http://itsnat.space/175169111113xmww.pdfIn PDF document text
    • http://temppicture.xyz/rilitazujiteselonifegosuxuie7m.pdfIn PDF document text
    • http://uber-global.com/baby_boy_names_meaning_god_answers_prayersz50da.pdfIn PDF document text
    • http://fashion-deals.xyz/zegizizntuv7.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/is_per_capita_income_gross_or_net.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/dd_3.5_mago_specialista.pdfIn PDF document text
    • https://cdn.sqhk.co/ribovonubod/EPicAja/62650263851.pdfIn PDF document text
    • http://wutopezogegusi.getenjoyment.net/shadow_monk_rogue_multiclass_5e.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/capital_in_canada_and_colombia_crossword_answerpug5t.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/aLBY8ic/44931215670.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/XRibgiD/craft_legend_guide.pdfIn PDF document text
    • http://armada.technology/55712958746bwalt.pdfIn PDF document text
    • http://bigtittybella.com/roku_3800x_review3x1ih.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujobope.atwebpages.com/46485047720.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/lukas_graham_love_someone_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/3dmark_11_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/cdc_guidelines_for_latent_tb_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/full_form_indian_constitution.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_off0000e70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70F 4944 bytes
SHA-256: 1614e808eef7a02dc2feff5fb55cf84376283e89250f050788b0a067e0be1a21
font_01_sfnt_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 10120 bytes
SHA-256: 1c59680a489c0020d62ab4408a6538844babeaa36bd6324a800fa1f73e6d9947

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