Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5246f511f28b378…

MALICIOUS

PDF

76.7 KB Created: 2021-03-16 09:18:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aef6e4febb0c34d949bd66fbadd14fea SHA-1: e42eac28959c1594a3218a864508e7ea67f014ba SHA-256: d5246f511f28b378e707a62e8ee4d61093620a0270382c0a1ccdbfaf6e97ff55
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous external URLs, suggesting it functions as a link farm designed to redirect users to potentially malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links, common in phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/strik?utm_term=casio+lk+100+review PDF link annotation
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/d478917e49dc4.pdfIn PDF document text
    • https://kopojari.weebly.com/uploads/1/3/4/5/134585935/7130282.pdfIn PDF document text
    • http://gusedori.iblogger.org/beiimaan_love_songs_mp4_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388620/normal_5fec949cc28d1.pdfIn PDF document text
    • https://gewefasawetuje.weebly.com/uploads/1/3/5/3/135315234/6502615.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/zosekobubezo_zodawefafekeze_bokola_mepug.pdfIn PDF document text
    • http://gemapijipepegi.22web.org/61398979263.pdfIn PDF document text
    • https://baxovazexozubuv.weebly.com/uploads/1/3/4/3/134318553/979fd3ee821.pdfIn PDF document text
    • http://sobebal.22web.org/gikesudatafe.pdfIn PDF document text
    • http://sexewemomupepu.22web.org/where_is_pilot_light_on_frigidaire_gas_stove.pdfIn PDF document text
    • http://jasetukuxazep.22web.org/google_play_store_not_opening_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5ff4847b49da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_5fe7d7075eb8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xevekezoxe.rf.gd/libro_el_amante_japones_resea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e01cd57a-1f59-4fca-9fdc-2d4713c1d955/73655797328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85805586-d9ae-40d9-b7ca-34f6e8aa51f2/jisuvar.pdfIn PDF document text
    • http://finezifor.rf.gd/create_color_bitmap_android.pdfIn PDF document text
    • http://pefemopu.epizy.com/dowowativoludasabaruf.pdfIn PDF document text
    • http://gawuvuv.epizy.com/android_sqlite_insert_auto_increment.pdfIn PDF document text
    • http://nujobig.rf.gd/rexidine.pdfIn PDF document text
    • http://julopok.epizy.com/mobile_phone_answers_in_pocket.pdfIn PDF document text
    • http://menaronutex.epizy.com/color_code_personality_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CA 4712 bytes
SHA-256: cc42ae7eaed44901e5f144caf219c6c042187655072e863f7ae19ff6c7f8e4b1
font_01_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 10400 bytes
SHA-256: c319130bad3fa7c9ea33c96134248d9fc79c0b0e6e009ddc2779c6aaaf70d3c5
font_02_sfnt_off00011784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11784 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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