Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1a76a1a3387a31…

MALICIOUS

PDF

68.9 KB Created: 2021-02-27 06:46:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3bff787cd0df1d7bcde072780e6abc0c SHA-1: 2bd729a238658edb94d57eb23701675712e54d98 SHA-256: 2d1a76a1a3387a31878898ca8ff4bbed01459be57f9eb6090330cc85a7222682
136 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically using an SEO redirector to disguise a malicious link. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL, 'https://jottigo.ru/wix?keyword=course+2+chapter+2+percents+test+form+3a+answers', is likely used to redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=course+2+chapter+2+percents+test+form+3a+answers PDF link annotation
    • http://fejekadiwoxobiz.getenjoyment.net/zoom_h4n_pro_handy_recorder_-_black.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/fb114856dc6c7a0.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/john_deere_js63_diagram.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/78706459114.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/jafajuwuruma.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/bixowarege.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/76635019143.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/15682738254.pdfIn PDF document text
    • https://dubilovatigalis.weebly.com/uploads/1/3/4/7/134701517/9736105.pdfIn PDF document text
    • http://pusuwanoxanopo.22web.org/ps4_emulator_for_pc_32_bit.pdfIn PDF document text
    • http://lewulumotuf.iblogger.org/70211409592.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuxesoguzegisox.epizy.com/farorozodotasumavu.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/56014895132.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/yeezy_boost_700_fit_guide.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/dr_seuss_paperback_collection.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/piliwuweji.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/30620407794.pdfIn PDF document text
    • http://duvefik.rf.gd/56804191234.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_off0000cf49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF49 5516 bytes
SHA-256: df1f0234b0702e703d92e35b4b36453a347309d1f065643058200487bc558e20
font_01_sfnt_off0000e1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EE 10584 bytes
SHA-256: 72151beb4aeced1d9fb5dded5210265cfd77c1e22381a5de656aa515b8de08ae