Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83176a4292fbc71…

MALICIOUS

PDF

70.8 KB Created: 2021-01-15 04:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d715be8c41c3b71830e2c9017de0110a SHA-1: 89405393c97ba3ea3c5514794f64d79d6dd8adf5 SHA-256: f83176a4292fbc71517c30f541b9df0f5f1231d1e3a1b64fc3ca51aa7d76f5fb
314 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.001 User Execution: Malicious Link

This PDF file exhibits multiple critical heuristic firings indicating malicious intent. It impersonates Gmail to lure users into clicking a link, which leads to a redirector and ultimately a PDF hosted on a Weebly subdomain. The document also presents a fake CAPTCHA, a common tactic to trick users into interacting with malicious content. The embedded URLs and the overall structure suggest a credential phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xotagolopotipik.weebly.com/uploads/1/3/4/7/134713968/zododinume.pdf.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://cctraff.ru/aws?utm_term=forgot+my+android+google+account+password In PDF document text
    • https://site-1166616.mozfiles.com/files/1166616/tenses_of_verbs_worksheets_for_grade_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5f8d2958a4c4d.pdfIn PDF document text
    • https://xotagolopotipik.weebly.com/uploads/1/3/4/7/134713968/zododinume.pdfIn PDF document text
    • https://site-1176840.mozfiles.com/files/1176840/ballpark_estimate_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476432/normal_5fca75651eee9.pdfIn PDF document text
    • https://sorefikope.weebly.com/uploads/1/3/4/6/134664591/064e041e91.pdfIn PDF document text
    • https://site-1188771.mozfiles.com/files/1188771/ninja_run_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_5fa579a270960.pdfIn PDF document text
    • https://site-1168221.mozfiles.com/files/1168221/hitman_go_definitive_edition_gameplay.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/davubewu/38114236820.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/bazedazubujatawek.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/evan_almighty_full_movie_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/neboge.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/update_android_tablet_4._0._4.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_off0000d774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD774 5540 bytes
SHA-256: 043839f0af55a24e6497da760e2d248abb227b0e7c2036107c419c5627d7b509
font_01_sfnt_off0000ea4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4C 10584 bytes
SHA-256: 64b9217a94d23a95af80866746deb4bc000222b52f5e6fa1e0ba684b0cfdaeb7

Open this report in the interactive analyzer, or submit your own file for analysis.