Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb44b163a6d700c…

MALICIOUS

PDF

70.7 KB Created: 2021-03-23 03:13:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b6a3bfa90b6d38e0b0fd3bda709a64ad SHA-1: c799622f34b44e47055e2fac49bcf4c2e4da6cd9 SHA-256: 1eb44b163a6d700cb2cb2fc112deb1220243f56f5f9d19c94a50dbd4bf937fe9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://crophysi.ru/wix?keyword=alfred+drum+method+book+1+pdf PDF link annotation
    • https://cdn.sqhk.co/jutafegobexe/WWvEQp1/gogizosupuxapad.pdfIn PDF document text
    • http://ranupila.mywebcommunity.org/12917477289.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/j7idmjb/bhojpuri_hit_song_mr_jatt.pdfIn PDF document text
    • http://moxupasasitote.mywebcommunity.org/41207795066.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/AAmAIji/luxuxuxubosuximapa.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/AihTzhd/muxozizegatabunegifogikix.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/vifQggc/84672263760.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxiteparam/iiCGXij/ugc_net_exam_date_sheet.pdfIn PDF document text
    • http://vimabanu.sportsontheweb.net/aprender_a_tocar_guitarra.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/hjVjhii/37833358767.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/82252409031.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/VA6hdMq/spot_desmosomes_function.pdfIn PDF document text
    • https://cdn.sqhk.co/gupetipek/jGAiaPH/jett_challenge_foosball_table.pdfIn PDF document text
    • http://wofurasosezisax.mywebcommunity.org/jetutomesubukuwesizixe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabiwilurase.atwebpages.com/37460783316.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/mibosazuvupurede.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/nedofizaloxedubatiwikuzet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b45f62-e7f6-4786-b2c8-cb74b69d93e8/libro_santillana_fisica_1_bachillerato.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/43915269387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8fdb5a-90c8-430d-a8de-066733b759b7/what_common_foods_do_not_have_gluten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/933efcd0-3bcb-4402-a8ca-1ce876240d42/ramatepuxujadolojuxiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df6fae3-e59e-41db-92aa-47f32298dbdb/60331176668.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/zubuxegosokogo.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/asnt_level_3_study_guide_download.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_off0000d74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74C 5140 bytes
SHA-256: 6bf3d06d5af05415533167fe77e404d68a73695f07835566b8fae87e0f7be2d1
font_01_sfnt_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 10716 bytes
SHA-256: cfce3c647b7f528b65f57daa19164d14de31ab5f2b401cbfaebcd9e88026a47c

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