Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ee35038cc7c654…

MALICIOUS

PDF

73.1 KB Created: 2021-03-15 21:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 28a343e095ec4646bafc6e3c8141824f SHA-1: 54f3e09d50a6c39fc834cca1db502f82fc3814b1 SHA-256: 02ee35038cc7c65429c537193048f6bcab1b410151d97dee621ff9cf28db5ffa
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by a ClamAV signature and an ML classifier, indicating a phishing attempt. It contains an external URI and an SEO redirector link pointing to 'https://druttle.ru/123?utm_term=dad%2527+s+worksheets+division+word+problems', which is likely used to deliver a secondary payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Dad's worksheets division word problems'. No scripts were extracted, but the overall pattern suggests a phishing attack using a malicious PDF attachment.

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
  • 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://druttle.ru/123?utm_term=dad%2527+s+worksheets+division+word+problems PDF link annotation
    • https://cdn.sqhk.co/wedifedaguju/eolBig1/31774747256.pdfIn PDF document text
    • https://cdn.sqhk.co/fedugaxoloz/cSgjbop/rally_legends_rc_fiat_131.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzekofuwe/izgfhgq/82830609050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d05c6f-9374-4eed-93bb-d2d4ed728f8a/the_hunger_games_catching_fire_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42a95cf-fc11-4164-af48-1f4ce954b740/best_reloading_press_for_300_blackout.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/tangled_cartoon_full_movie_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/mamomomafekuretuvez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0dfae32-e53a-4077-86d6-b201f0490e37/how_to_multiply_and_simplify_square_roots.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/free_online_credit_report_canada_equifax.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/bebotikemugadare.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/why_is_my_fridge_not_cooling_enough.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/lekegumunutatugevitit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce7123d-c329-47c2-8a05-cb2e796ef503/23152740313.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/nirebizu.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/menolobosifusokisa.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/boxuvomarerimugokonitasi.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/vifazetanepibumedazozik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc190b55-fc17-4e44-aa8b-53501ccd934a/1997_ford_f350_rust_repair_panels.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_off0000e28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28E 5588 bytes
SHA-256: d8cf23df334037c854faa448be52e189130a5fcb992a7cfd613da0c11ee8d33a
font_01_sfnt_off0000f586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF586 9852 bytes
SHA-256: 25c5b3e713e879a65afa435df49a283fb9d674f59e17cc09bbeb12ebee0c7eb5

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