Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e801e6051f0d7ac…

MALICIOUS

PDF

44.7 KB Created: 2020-09-29 23:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 37f9fe8297e5506fae799919def55d67 SHA-1: abbcb5de186208d1c43f2b9ef296a0412d214048 SHA-256: 8e801e6051f0d7ac262bf7a5b71836c8cff9d22eb30d89636187b64042f9f1ef
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://cctraff.ru/strik?keyword=langman%2527+s+essential+medical+embryology+pdf In PDF document text
    • http://bilere.cvpolygraph.com/uploads/1/3/0/7/130738711/futelubapuxuvikefo.pdfIn PDF document text
    • http://siwar.orangecountygeraniumsociety.com/uploads/1/3/1/4/131407469/gegazerisomo.pdfIn PDF document text
    • http://nejimo.triplecrownfastpitch.com/uploads/1/3/0/7/130776457/8366588.pdfIn PDF document text
    • http://files.xmmphoto.com/uploads/1/3/1/3/131383889/ruwonajelebujeresax.pdfIn PDF document text
    • http://puzesowo.kruoutdoors.com/uploads/1/3/0/7/130776078/zujika.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/0470ecba-b886-45d8-b6b5-35cc0a9aa5af/riwekutawijol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4aea1e-8fb8-431e-b058-a873df8e40b1/borozupegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/072e8c72-c1f8-4a4e-be30-7b3d882c4704/pigudawafikexunadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/dota_2_lich_support_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1784/6432/files/chamma_chamma_new_song_djyoungster.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3966/7877/files/audio_video_converter_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6492/9687/files/agent_ransack_windows_7_64_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/8002/2937/files/2011_cadillac_cts-_v_coupe_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/60231633116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2405/4432/files/rokifesepaponiledirujoz.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_off00006647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6647 5692 bytes
SHA-256: 9bd407ea5cfc03b7b5af579d5dcd50fd0e3b0bf9929cc3efcf859998785d211c
font_01_sfnt_off0000799f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x799F 14188 bytes
SHA-256: e818fe4767d649312dc57ae431ecdde1bf82019aaa51d204febd11055a21c106

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