Malicious PDF — malware analysis report

Static analysis result for SHA-256 708af44e9c02f072…

MALICIOUS

PDF

71.4 KB Created: 2021-02-02 03:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fa32390b45a772adaace7343cce3a7b5 SHA-1: dbd97d7f94fa6443b3c6cb91efe7047fc01b3d86 SHA-256: 708af44e9c02f0729892429058bea7bbc7c82fed2e5b51ad32b2738638ddbf56
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=classroom%20management%20strategies%20for%20high%20school%20ppt In PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/f0a15bb.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/pugizife_toxusuridez_bamage.pdfIn PDF document text
    • https://wavinibavuma.weebly.com/uploads/1/3/1/3/131398010/7857874.pdfIn PDF document text
    • https://wokusozevopiwaj.weebly.com/uploads/1/3/4/3/134381386/kesaxolukul_gowib.pdfIn PDF document text
    • https://soravetojovon.weebly.com/uploads/1/3/4/8/134890923/wupiruxex.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/ronutixixigupos.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/mosezavor/bcbsm_prior_auth_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/daniel_james_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/44622496801.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/brother_birthday_tamil_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/wendy_s_chili_nutrition_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/rabexapenonojitow.pdfIn PDF document text
    • http://jojofolarimema.epizy.com/building_cost_spreadsheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/email_extractor_from_file.pdfIn PDF document text
    • http://budezeja.rf.gd/camelot_tv_series.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_off0000da47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA47 5332 bytes
SHA-256: 0ac943bb8d1b90b73c12f5a6dca2318663efd47359a4e2dd486eb8d1b3753fc9
font_01_sfnt_off0000ec3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 10764 bytes
SHA-256: e92a5a257901320a80965289c865f54eb3412b2e574409525d04c1c72d1bb121