Malicious PDF — malware analysis report

Static analysis result for SHA-256 07314b7cc51855a4…

MALICIOUS

PDF

83.1 KB Created: 2021-02-28 17:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d25d0e7c12728abce9ee108b4b801307 SHA-1: ce9e00a46f5f771f9fffc76604ab711da1c3e967 SHA-256: 07314b7cc51855a41700c58afb20a5d06892e0839d47d8cf2970446ffa0a50b9
76 Risk Score

Malware Insights

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

The PDF document contains a lure related to fly tying, which redirects to the URL 'https://maypoin.ru/strik?utm_term=how+to+use+a+rotary+vise+fly+tying'. This URL is flagged as a redirector for phishing, indicating a likely attempt to deliver a malicious payload or phish for credentials. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://maypoin.ru/strik?utm_term=how+to+use+a+rotary+vise+fly+tying PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485153/normal_5fd67f20e3d05.pdfIn PDF document text
    • http://texno3ua.com/lexila1iv2r.pdfIn PDF document text
    • http://phtech.site/how_to_clean_my_honeywell_warm_mist_humidifier1np2j.pdfIn PDF document text
    • https://demizuxikeb.weebly.com/uploads/1/3/4/0/134000208/videzaroxikozi.pdfIn PDF document text
    • http://netewe5.xyz/xibuxisepuledwzy7.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/jumasosan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_6011618457551.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/51269216640.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409095/normal_5ff2b13aaf82c.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/b704c03.pdfIn PDF document text
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/70c17ef708cef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490961/normal_5fe76db9351c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374359/normal_5ff90bd38e6ff.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/zowibatev/dubojewitowosusukimiduxo.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/vawiberadurepeb.pdfIn PDF document text
    • http://balopatesegefa.rf.gd/firefox_browser_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/4013089011.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/demographic_information_format.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/les_plantes_halophytes.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_off00010736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10736 5148 bytes
SHA-256: e76658990d47211c95ac6da08c33f801bd489f74ddd5f87375c343d098ac53e8
font_01_sfnt_off000118ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 11224 bytes
SHA-256: 40d9c8ee49aa599e800fb7dd77301ec45fc3411d4a1ff7d5de1d3f4e1e3231d2