Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb47a15791ca370…

MALICIOUS

PDF

78.3 KB Created: 2021-02-14 05:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3750077dcd8a5fd25bc1ca677fe521e7 SHA-1: aa3cdccf7775a3e0da2ec3e11b8714eea8f978f4 SHA-256: beb47a15791ca37017b9feda518c23255b5d9b3c97eb78fc0f7c9838022c5645
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute potentially unwanted or malicious software. The presence of a 'download button' lure and ClamAV detection further supports a malicious classification. The ML classifier output of 0.999617 indicates a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=pes+2018+mod+apk+unlimited+money+offline PDF link annotation
    • https://tadadali.weebly.com/uploads/1/3/4/0/134095934/393359.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/8164313.pdfIn PDF document text
    • http://rubka.space/champagne_bottle_cake_template6xd0e.pdfIn PDF document text
    • https://mogewojelepa.weebly.com/uploads/1/3/4/6/134681452/xizofuf-guminiv-nojonifugigawoj.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/jitureraze-zugitajivabaki-wulozif-jusutafelozawa.pdfIn PDF document text
    • http://profapp.pro/gejogagamiwiwepibesowfw00.pdfIn PDF document text
    • https://pizijejubuga.weebly.com/uploads/1/3/4/8/134883891/863146.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/jalumokudez.pdfIn PDF document text
    • https://cdn.sqhk.co/nubalevuvem/jijib8I/idle_island_mod_apk.pdfIn PDF document text
    • http://vkrowl.com/pesidilezuc17r6.pdfIn PDF document text
    • https://lowaribopuvege.weebly.com/uploads/1/3/2/8/132814272/5699670.pdfIn PDF document text
    • http://fruit-ita.fun/565131860145mdhd.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
    • https://s3.amazonaws.com/bepukuba/fcpa_compliance_report.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE07 5660 bytes
SHA-256: b9517bd5617ffc1aca66515952f15fb169df711f21aff065e7493f1f9dcb804f
font_01_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 1796 bytes
SHA-256: 68bbe42c93759ab90c218695aa25c1747b40456063d11b0ac06b51d2514fd3e6
font_02_sfnt_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 10572 bytes
SHA-256: 60d71876d0d07e21070aefb5c0ea81929105158557472ce865372d582c08703d
font_03_sfnt_off00011dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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