Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc30877276976167…

MALICIOUS

PDF

69.2 KB Created: 2020-11-18 08:17:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3293d97a354f4a7c9605ae778f708c51 SHA-1: 931ded88cf928a9661b0a363e7f55904b713c05b SHA-256: fc30877276976167f3a09632296fc69ea2d8897cc43bee2344aacc9a49cf91d7
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The presence of a 'download button' lure and the embedded URL further support a phishing or malware distribution attempt. Although no scripts were extracted, the PDF structure and linked URLs indicate an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/aws?utm_term=nios+dled+assignment+front+page+pdf In PDF document text
    • https://xujajogasugoni.weebly.com/uploads/1/3/4/5/134514057/lujepezuresi-vojegetunif.pdfIn PDF document text
    • https://vilujelirajoki.weebly.com/uploads/1/3/4/3/134378771/kowowegaxelerof.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/kilaruvakix.pdfIn PDF document text
    • https://farupixin.weebly.com/uploads/1/3/4/3/134314126/dipogoti-fedugofezosowel.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/2602595.pdfIn PDF document text
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/4054180.pdfIn PDF document text
    • https://kapomubevobi.weebly.com/uploads/1/3/4/6/134681937/4432571.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/rimejiguvif/jukufitarekoruva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f72307b-e878-4799-9d7f-32d1f73892d4/bookshelf_background_for_zoom.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/c._a_full_form_in_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4471cf29-e5d4-49c3-a9d3-94bc72cdd2b1/ledezawegarik.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/thesis_statement_standardized_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/facdf887-e32f-4384-ac4a-0cd6b5637b43/xesemasofimidafujezat.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/bts_fake_love_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/65391214226.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_off0000c1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DF 5116 bytes
SHA-256: 47da61d0150d7c9d5af83bdb7b20cb1225a960405c622cf85f985663d4fca16d
font_01_sfnt_off0000d32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32F 10804 bytes
SHA-256: 79c0cf7fb91554902438cf9df577c61b3056e1e98c101f4a4f2e901a43bc99d1
font_02_sfnt_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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