Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86cc7341a7917fb…

MALICIOUS

PDF

71.9 KB Created: 2021-02-22 21:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f13bf3e8aae27bc73b5420e089721731 SHA-1: f7d2b23af4f09dc5ab2762afc3d582521daea21a SHA-256: d86cc7341a7917fb83fbbe04efe5e1da42be6d314854df2aa3abd93eef960fc7
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=club+ez+fit+group+workout+schedule In PDF document text
    • https://mokazolupi.weebly.com/uploads/1/3/1/4/131453520/zigisumiz_buzawademininoz_bugetibanuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481069/normal_5fd0d764caecb.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/nTcgjhh/cooking_sizzle_master_chef_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vakamuzawa/fh2Z3gd/boniwivapavoladuvovugowa.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/vagopod.pdfIn PDF document text
    • https://rinixupikexem.weebly.com/uploads/1/3/4/0/134096042/340f9fae.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/f9jdjga/walktrhrough_toca_hair_salon_4_updates.pdfIn PDF document text
    • http://wugafis.66ghz.com/18691733204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367633/normal_6005904472bb9.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/xuvamuba/platform_number_14_ndls.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/clearwater_beach_weather_report.pdfIn PDF document text
    • http://ninukak.epizy.com/sudufaxew.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/cgp_gcse_physics_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/letter_of_authorisation_template_australia.pdfIn PDF document text
    • http://rukudukewa.epizy.com/great_fairy_s_fountain_piano_sheet_music.pdfIn PDF document text
    • http://rofamotitasijud.rf.gd/wonder_woman_movie_in_telugu_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/8386496676.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/nokezowiribebuloruk.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_off0000dc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC97 5460 bytes
SHA-256: 3eaf6dc41f3d0f56e7f11cb6719ef3a47c61260d91fe3f2a8884f0f8f5deb178
font_01_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 10400 bytes
SHA-256: 9c16c62a19077bae410ec2d35d22294caa061c8cb7a4d46ea5ab6866ce6bf76b