Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b606b9a2d97b718…

MALICIOUS

PDF

107.9 KB Created: 2021-02-12 03:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e82f379f88fbf1052b3c5d58aa1f6ea0 SHA-1: eef745af567ecd8aab718e575843f15e0928a40c SHA-256: 3b606b9a2d97b71818cde6e236daf62b29245a3ac21688bc58d3d2eefb9b8d3f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a PDF link farm containing 30 external links. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a tactic to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=autel+ms300+manual+pdf PDF link annotation
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/31518084905631d.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/hhehgXr/jatoxumiwivisuwibedet.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/fifRhgR/can_you_learn_at_home.pdfIn PDF document text
    • https://rofoxanubojinud.weebly.com/uploads/1/3/2/7/132740779/lenuniwipu_xaselali.pdfIn PDF document text
    • https://sutowuvo.weebly.com/uploads/1/3/4/6/134685384/1631439.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/127468bf390c46.pdfIn PDF document text
    • http://kimagibasip.22web.org/locked_out_of_heaven_violin_sheet_music.pdfIn PDF document text
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/xofemonegu.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/hhpPibf/chicken_little_iphone_wallpaper.pdfIn PDF document text
    • https://kuxozofaxaxasij.weebly.com/uploads/1/3/5/3/135325708/gupifaxusaluk.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/kobol.pdfIn PDF document text
    • http://tozepefaj.iblogger.org/ayat_ruqyah_penyembuh_segala_penyakit.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/fiction_avenged_sevenfold_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/waxobaselixojojoxutodavo.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/25253105236.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/cofco_international_singapore_pte_ltd_annual_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B16 1768 bytes
SHA-256: a7830af281c6d7b61dc692724ea72cf36a7ea757c697155e9fdc4833d1a940fe
font_01_sfnt_off000163bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163BD 5384 bytes
SHA-256: fa3e02ed6a19dd629f0706b17c42a78eb1b27f5b389b586d331ab9d69519e521
font_02_sfnt_off000175fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175FE 14096 bytes
SHA-256: 1c0ffe3b0f20dc571ad3404a2881c65ec16c1aef8b21b13e63ff158ccca57718

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