Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fd198a759c876b…

MALICIOUS

PDF

76.5 KB Created: 2021-02-15 06:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4b9e0af392579fd48950bcc966ee0cf5 SHA-1: a630eae2a5f9d59b76c15587c188893b9204549d SHA-256: b7fd198a759c876b90b73acb28d5ffce5ef53f99d341e32c00bfb5fe0f88e678
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains a large number of embedded URLs, many of which point to disposable hosting services. The heuristic firings indicate it functions as a link farm, likely intended to redirect users to malicious content or phishing sites. The presence of a link to a known malicious redirector further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://crophysi.ru/wix?keyword=dark+and+lovely+semi+permanent+hair+color+instructions In PDF document text
    • https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/1819185.pdfIn PDF document text
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/wesiwijalavikap-barusopazasotaj.pdfIn PDF document text
    • http://olipaka.xyz/54727227467pd26e.pdfIn PDF document text
    • https://veregatuvodomos.weebly.com/uploads/1/3/3/9/133997599/wiziwewimoxifu_goxedixezez_tinemofenekera.pdfIn PDF document text
    • https://mumanewuneju.weebly.com/uploads/1/3/2/7/132712109/kupujukefufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384152/normal_5fdd13d3ae476.pdfIn PDF document text
    • https://gavebinakufir.weebly.com/uploads/1/3/2/3/132302735/8399416.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/hevgdhj/mini_golf_near_me_with_go_karts.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/xuhhpii/3335552310.pdfIn PDF document text
    • https://cdn.sqhk.co/linewebozid/9OxQHhb/stargazing_bubble_camp_minnesota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412415/normal_6012a41a22603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500429/normal_600ddf4944a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480891/normal_5feaedf82df29.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/form_19_pf_withdrawal_samplew2tnm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410989/normal_5fc9619533702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fdc5ad0c79e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 5540 bytes
SHA-256: adcd2c22e0f371da3e5ee045d269241e62d4db4c65e1b4659fcd80600015b383
font_01_sfnt_off000100b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B0 10412 bytes
SHA-256: 2e505bc5f2015de1b20a28de1707421b08f817020f306ea985f898aa2c6230f9

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