Malicious PDF — malware analysis report

Static analysis result for SHA-256 887d013af427179d…

MALICIOUS

PDF

74.4 KB Created: 2021-03-23 22:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fc5e7f3a2d18dfe8a91e64bf66c1e42d SHA-1: 07c058ac4bbe1c2a07ba313db7eb55655ab214f2 SHA-256: 887d013af427179d67cf4bc48dd06ff68279968585984fd2e75f7fbd1a0a0306
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 0.9996

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://kuzutuzo.ru/strik?utm_term=why+does+my+gerd+keep+coming+back PDF link annotation
    • http://lakujalinifibo.mypressonline.com/53879685709.pdfIn PDF document text
    • http://nafigunagofadab.getenjoyment.net/because_of_winn_dixie_book_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_6050d922db965.pdfIn PDF document text
    • http://xojanefod.mygamesonline.org/59044214238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500447/normal_5fff3da9ed72b.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/jiibhcg/tikajanojilefefov.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/g6Njfji/amazon_music_hd_download_limit.pdfIn PDF document text
    • http://finonit.mypressonline.com/41751582025.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/hiObrjd/zolifufomumemoferaka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_5ff36c49e9ead.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fe2be3b7af4f.pdfIn PDF document text
    • http://botefin.medianewsonline.com/george_foreman_grill_flank_steak_cooking_time.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_83b586db695942e1b0b551b50a65f3d6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b5e08b-f996-4677-896c-c34f9a6d45a1/jipusudasolafuxeke.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_cb8c9645b11b40cb91bdc37a41711691.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0457f4e7-677e-421a-822b-c361e86ce1b3/why_greek_gods_were_created.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a2b51c-545f-4d9f-aac2-ca87db443f28/too_big_to_fail_term_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ec9bcd-0518-467d-9361-6c692c5255bb/vowugobilinaxisipuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5842421a-78b9-4c2a-9e30-aa1ceed018c7/wii_u_console_bundle_deals.pdfIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_4141917427eb415d92979ab2975ec663.pdf?index=trueIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_7befa17a1804494488867821d263cb73.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 5776 bytes
SHA-256: 2af4902a7ecc20ad58f6acf6221cb1948cbe104e809c5001664eddc2c1df593f
font_01_sfnt_off0000f9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D2 9940 bytes
SHA-256: f597c829fe6ea4150b6b92c1226e8ac073cf87251b6e114c68861670639aa7ec

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