Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe151b36207a2a32…

MALICIOUS

PDF

75.6 KB Created: 2021-02-24 00:38:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e9b4c7fcce342e01693944fb325dfd42 SHA-1: ac18c3c69cb9819baf3522cb600da702b592af7b SHA-256: fe151b36207a2a32bf507ca87653ac23951d5b3d244d96d0e05bb59577257a62
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of a PDF link farm and a "download" lure suggests an attempt to trick users into visiting external sites or downloading further content. While no scripts were extracted, the overall structure and heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://druttle.ru/wix?keyword=descargar+worms+3+apk+uptodown PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5fff6f6323bdf.pdfIn PDF document text
    • http://yesnutural.space/12138635128mbgml.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420939/normal_60357d4519b61.pdfIn PDF document text
    • https://pufopobumosuv.weebly.com/uploads/1/3/0/7/130776602/7071121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_6010003a00486.pdfIn PDF document text
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/jaxovesarubono-sebelup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5fd1002467b67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_600062f6d7ae5.pdfIn PDF document text
    • http://itdomen.fun/16718166212fjgqj.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/lolijexejomak/85357340653.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/annamayya_cinema_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/what_the_bible_says_about_milk_and_honey.pdfIn PDF document text
    • http://rawozenagi.epizy.com/84169696905.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/dimesixepuvufot.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/9th_grade_biology_textbook_prentice_hall.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/alcohol_withdrawal_guidelines_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/canon_g7x_iii_manual.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_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 5680 bytes
SHA-256: 4ca468d1ddcc45de923cf70d41f2f7efd0509a3605d6cbaab50974ed8316ca75
font_01_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 10580 bytes
SHA-256: 1281ef225d06ab42c44a848ca5a1533759c72c2bba3cb91882d6fc89fc549dbb

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