Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6fa8fa5a8497d1…

MALICIOUS

PDF

75.7 KB Created: 2021-01-25 12:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2ce8db70884072e6457155f8863e811f SHA-1: 0419ad33dc98d5d9dcb9b0c9c75c8f25ff01d5ec SHA-256: 2b6fa8fa5a8497d10612152efa4bb49791bf69b6f9a392075d99cc120e4e9481
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or link-farming attack pattern.

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 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.
  • 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://traffset.ru/123?utm_term=1+pint+to+ounces PDF link annotation
    • https://pobozopidukav.weebly.com/uploads/1/3/4/3/134384736/3103179.pdfIn PDF document text
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/vunexopipifisovusu.pdfIn PDF document text
    • https://xijegasafofid.weebly.com/uploads/1/3/0/8/130815381/05f1c.pdfIn PDF document text
    • https://kumaradogutaf.weebly.com/uploads/1/3/0/7/130775833/106dcb292bdf.pdfIn PDF document text
    • https://gavititexufo.weebly.com/uploads/1/3/3/9/133997787/4554753.pdfIn PDF document text
    • https://kujepilam.weebly.com/uploads/1/3/5/3/135343620/fb043f85a008.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/hc4fCji/59158973732.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/61313900717.pdfIn PDF document text
    • https://sinuxogutit.weebly.com/uploads/1/3/4/5/134505158/5179342.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/fjhih6E/80_s_freestyle_music_artists.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/2770f237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pobixedele/certmgr._msc_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/punenuriguvetumez.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/pumagusunuzisudozabaki.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/lagu_dangdut_anggur_merah_megi_z.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/vuxagulimemuluwaduxu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/12997484550.pdfIn PDF document text
    • http://gosigugul.epizy.com/60845448511.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/reduce_to_canonical_form_pde.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/video_show_app_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/english_font_style_free.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_off0000ebae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAE 4544 bytes
SHA-256: 2b0b865737a8054a291ac696e11829e6fdfc405b2d24d892d3e50207a4c0f2ff
font_01_sfnt_off0000fb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3E 10768 bytes
SHA-256: 40303dba27246704fc9eeaef0220164950538e8c1c438e07e173b4bb3cfa8948

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