Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b044aeedcef880…

MALICIOUS

PDF

78.1 KB Created: 2021-03-17 03:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1ba88ebd1f71064414cecd93bda7eb12 SHA-1: 9ef52837602e6f906795d91dd0cb747d761748a0 SHA-256: e8b044aeedcef880101050741ccd1702684ca9c9d730f7469099c8ddc0428b2b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://midufefew.ru/wix?keyword=muskegon+comcast+channel+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495973/normal_6041bb8b0239d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489732/normal_6028efc5e5d3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5ffe42a67aabc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489599/normal_601e650666aca.pdfIn PDF document text
    • http://instapriz24.online/do_beats_go_on_sale_for_black_fridaybg3rb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416302/normal_5fe365110e5d5.pdfIn PDF document text
    • http://damvglaz6.xyz/adobe_acrobat_pro_dc_accessibility_guide_using_the_accessibility_checkerwmr7j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379485/normal_6004b27cd2d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_601ec91759d44.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/z4gdVvv/word_legend_puzzle_addictive_crossword_connect.pdfIn PDF document text
    • http://kernig.store/nikuvilawuxiwinurewitaboyh64h.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/ggDOhg8/hole._io_online_mobile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_604b346831c8d.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/Njgieb9/entergy_phone_number_port_arthur_texas.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/e52bfb44-1aea-4f00-8d81-f347308844c9/an_imperial_affliction_book_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d48ad1-61c6-4b17-bcf4-f29231138e40/conversion_harina_gramos_a_ml.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/78465328231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08acb3b4-fc3e-4448-bb85-0a92637bdd72/fatexuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d7747d-1b1a-4087-a53f-1930ae46581f/sepezonoraxobigabasesi.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/android_studio_gradle_dependency_graph.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_off0000f0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D3 5324 bytes
SHA-256: bed89e2873d7179b8ef054cb7b6ba1c17b490de0908eecdec5cbec7a5c6ca40e
font_01_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 11424 bytes
SHA-256: e18859234d2b583c85d8bb314ff7bb4b0c30b9eccf470f1788b78cd3593d70d5

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