Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d27b1afd2e88eaf…

MALICIOUS

PDF

72.5 KB Created: 2021-03-27 19:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5c1caeb9ff21ac9b5743a56855317e7 SHA-1: 5cb62ec8e984985d9bd4d2b988d88eb11530ca6e SHA-256: 5d27b1afd2e88eaf26ee5ca8d001f46c22897e5e4de5a6adbcebfd594619b4dd
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://xajibur.ru/123?utm_term=android+wear+1.+4+apk PDF link annotation
    • http://nipawifaxupus.mygamesonline.org/korean_alphabet_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458122/normal_605ef77cc0779.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/Cihhe1b/tunein_premium_free_account.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/cooper_lighting_apel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444115/normal_60282bb29095a.pdfIn PDF document text
    • http://weridif.medianewsonline.com/benefits_of_online_shopping.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/i0jazhh/natural_looking_acrylic_nails_coffin.pdfIn PDF document text
    • http://losqutoq.online/what_about_federalist_70_concerned_the_strict_constructionistsuvizj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_605f32149b04c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_602da2ee04d40.pdfIn PDF document text
    • http://job-finder.space/hotpoint_gas_stove_older_models286mc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381294/normal_5fc809a01a7e2.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5fec46b7bf7f9.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/837195194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_605c45db3db95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_9fd3f0534dcf451ca1e481dc01032b95.pdf?index=trueIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_6d06c2dc58f844b099273d6fce07a3e5.pdf?index=trueIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_85b914ff8ae14a78a585471861b5040c.pdf?index=trueIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_113c7dc0c714415fb1196226376b255b.pdf?index=trueIn PDF document text
    • http://vovojoj.atwebpages.com/konirogagopefepelip.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_off0000d94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94F 5060 bytes
SHA-256: a46803d882475728d17e22e72bf02d5d29796cdcc295696ee166a78356137f66
font_01_sfnt_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 14028 bytes
SHA-256: fb28aa4f76df00e7d744a8ed2c07729cec58446a6dc46939221625db70c38f40

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