Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ead79ac66a50c4e…

MALICIOUS

PDF

66.7 KB Created: 2020-12-08 12:16:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fea7cc1c855d11325928eef30463ba41 SHA-1: 7975d0f1dfdb87927f4f50e10a91cec251ccf030 SHA-256: 4ead79ac66a50c4ea916b005a1ee1a64127eb196c3c93b31bafa5eb00c287de5
274 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a brand-impersonation credential phishing lure (Apple) and links to known malicious redirector infrastructure. The embedded URLs and the document's structure suggest it is designed to trick users into clicking malicious links, likely to steal credentials. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/5011185.pdf.
  • 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://gettraff.ru/strik?utm_term=change+chromebook+password In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f8ab3aba3d16.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/5011185.pdfIn PDF document text
    • https://joponavo.weebly.com/uploads/1/3/4/2/134234964/gesop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375086/normal_5fcbdc987adaf.pdfIn PDF document text
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/mojoze.pdfIn PDF document text
    • https://judexibegajojid.weebly.com/uploads/1/3/4/8/134885636/6768288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc932737-12f5-479b-af29-6c39880e089b/wwe_raw_ratings_today.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/harvard_law_review_submission_guidelines.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd190a32780c533aab50be/1606228239508/standard_horizon_gx2200_installation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59593c02f22b9d047aa6/1606375769504/55534173084.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/68085273686.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/aristoteles_organon_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039a677c-2263-4fa0-9553-ab58c3aa6bac/jeff_the_killer_game_unblocked.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a873e5c7695ca9a6fc9e/t/5fcbebc26e74d26c6f0d2716/1607199682664/6927981156.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf119b7ee8e70759d4042/1606218010768/72689679855.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_off0000c8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F8 5656 bytes
SHA-256: e4082eb2714c6f59b165d7701dece4a615579f96d7211b93906dfcb1d7ab5c6b
font_01_sfnt_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 10024 bytes
SHA-256: 688dbcef429db1d42418c0d0a245f13ea696f397333db0f1794ba17ed776a0b3

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