Malicious PDF — malware analysis report

Static analysis result for SHA-256 577f879d8b25b31e…

MALICIOUS

PDF

75.3 KB Created: 2021-02-14 22:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: afdc28f48331a3c80694e0515eb8c167 SHA-1: 0b484a53ef14ee4d4ce7da9a015926f8fda3562b SHA-256: 577f879d8b25b31e2804f9492ea96d8a5fa6b2f121938ab576245c8059b622d0
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://yafferge.ru/wix?keyword=bulk+8oz+baby+bottles', are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=bulk+8oz+baby+bottles In PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/e8c5f8d98a79bf.pdfIn PDF document text
    • https://wivutukezed.weebly.com/uploads/1/3/1/4/131438473/kaninevejad-natowir-gufat-zejepen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372377/normal_6004dc8c53fa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423752/normal_5fdcc3b7c8e29.pdfIn PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/femuwanes.pdfIn PDF document text
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/1322079.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489839/normal_6000bc4978596.pdfIn PDF document text
    • http://jinokawobusuzi.iblogger.org/daditagezometakowisox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_5fea149cc0102.pdfIn PDF document text
    • https://ponixetuga.weebly.com/uploads/1/3/4/6/134668384/fixixupudabiwegit.pdfIn PDF document text
    • https://voranafirodibug.weebly.com/uploads/1/3/2/6/132696030/1509144.pdfIn PDF document text
    • https://duvigefotazepex.weebly.com/uploads/1/3/0/7/130775674/3076025.pdfIn PDF document text
    • https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/3983939.pdfIn PDF document text
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/cdc6b.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/toguvaju/lagu_chelsea_grin_dead_rose.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/bts_answer_billboard_200.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/90997540656.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/pogubeduzoxuke.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_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 5184 bytes
SHA-256: 0e0abf10d826dc7be7148d05a85411668d13b39a5625c330eaaac36cfb526fc5
font_01_sfnt_off0000fdb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB8 10180 bytes
SHA-256: 72d04ab21c6c120ae748661c79d4b7ae97aeb834d55ea86afd1bc1a595cf2314

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