Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5093cdf72f8cdc5…

MALICIOUS

PDF

361.2 KB Created: 2022-05-26 21:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 6fa9315df901d6152a1dafd4676cc030 SHA-1: a635153db584239487aa497d33bc4522a705c30d SHA-256: d5093cdf72f8cdc58c4e608b14c1a60f097ab5961a6612597699a27d157bff92
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an external URI and an image lure linking to an SEO redirector, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of embedded URLs and the overall heuristic firings indicate it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7167

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://sunuf.co.za/XSRYdR1H?utm_term=make+way+for+dyamonde+daniel+activities+pdf+free+online PDF link annotation
    • https://janokapaw.weebly.com/uploads/1/3/4/3/134329878/jakorivajuze.pdfIn PDF document text
    • https://kerijene.weebly.com/uploads/1/3/4/3/134367262/7126291.pdfIn PDF document text
    • https://sivasanetit.weebly.com/uploads/1/3/6/0/136095735/vumazelexer.pdfIn PDF document text
    • https://teravotizu.weebly.com/uploads/1/3/4/3/134335056/5864316.pdfIn PDF document text
    • https://vobotazesu.weebly.com/uploads/1/3/3/9/133986327/dda7b341cd.pdfIn PDF document text
    • http://onlineauadms.com/ci/userfiles/files/jovorukadegexadula.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/70dc5.pdfIn PDF document text
    • http://playos.net/data/playos.net/uploadfiles/file/59045554244.pdfIn PDF document text
    • https://robiwadanojiso.weebly.com/uploads/1/3/4/6/134644007/sovugaka.pdfIn PDF document text
    • https://e-s-c.fr/lib/ckeditor/kcfinder/upload/files/raxejotozu.pdfIn PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/4224044.pdfIn PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/budumuki.pdfIn PDF document text
    • https://fejawizekojiwi.weebly.com/uploads/1/3/1/4/131438151/a71b57c.pdfIn PDF document text
    • http://promastersecurity.com/sites/default/files/file/kalag.pdfIn PDF document text
    • https://wixivowid.weebly.com/uploads/1/3/4/6/134689466/rutoputivekobozizef.pdfIn PDF document text
    • https://zilojefigixup.weebly.com/uploads/1/4/1/4/141416389/junamixaferewula.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/dovavevivigoze.pdfIn PDF document text
    • https://ridewavovelomu.weebly.com/uploads/1/3/4/6/134697160/bovaro_xelesuvigux_radagebezoden.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/miragimu_fukewetiwig.pdfIn PDF document text
    • https://tijojobagiguli.weebly.com/uploads/1/4/1/5/141525659/1487298.pdfIn PDF document text
    • https://najiridudubedip.weebly.com/uploads/1/3/7/4/137498874/4918131.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/werimurobubaza.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/giduzawufivatofamifurene.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005349b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5349B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00054cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54CAD 17600 bytes
SHA-256: f2c2db538b98a96c702f837d871c127ab683aa33bc15d8268e292a1888fcf0a7
font_02_sfnt_off00057b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57B23 11132 bytes
SHA-256: 664c4124721683d0cc9fa060be83d7a320e44748d0dd0f41ba3618d2c7652800