Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2394981dda8bbb…

MALICIOUS

PDF

59.7 KB Created: 2020-10-25 22:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-20
MD5: 8f379363d7eb9a7e3ddc8636e280de37 SHA-1: 80eabf59232df6e0771d988432e395345f02310f SHA-256: 0a2394981dda8bbb8885d5603f1863530e6da140f156baf0c1c10b9c37346873
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.me/123?keyword=subrahmanya+bhujangam+english+pdf In PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/a6fd1d.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/timelaner-jibivivudokexoj-bagopasufa-giruti.pdfIn PDF document text
    • https://nekizinatuzi.weebly.com/uploads/1/3/4/3/134325328/3111270.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/66e58.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/8785599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f8ec28dd999e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_5f8f9b3a9b483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_5f95a74d52326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5f90bd0285966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f912af3f13e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/abas_3_scoring_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3900/6113/files/android_sdk_avd_manager_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8460/2262/files/89639208174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4982/0065/files/zawizotisopawokowuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4441/2826/files/best_4k_video_camera_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5194/8453/files/sewifuwuvejajikesuxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8296/7957/files/dofiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e049a98-d9f6-47d8-8c27-680068805ef5/virutugikipanopewuzuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8397ac-a850-41bd-957a-2aae8a096dbf/97107238942.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/karuwepogexipok.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/making_adjectives_and_adverbs_exercises.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b6f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB6F2 23992 bytes
SHA-256: 3aba524ddf8ec0c61c64ea2af0d5b7b85dd76498a9572af3bb742093f5fad1f2
font_00_sfnt_off00007dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC4 5876 bytes
SHA-256: 021f8744bb38790dae0957c64b62008e1fe2ee513622c4198359f7925dfd21c9
font_01_sfnt_off000091a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A5 10848 bytes
SHA-256: 778f5a06e7807ee64f82db74f18607c31c67401ea5d95d9ba60c88d8be70966e

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