Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa93fe449011582…

MALICIOUS

PDF

75.7 KB Created: 2021-04-08 03:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: af17f302184271b80d90c64d04a82f0d SHA-1: 227b310556d81aab36d73764823684d0fb093109 SHA-256: 6aa93fe4490115822af9c28f4e43bdb8e74c9713196388cf06b1ff1cd295e910
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting an SEO spam or phishing campaign. The primary URL, https://soxebez.ru/wix?keyword=partial+periodic+table+answers+key, is presented as a lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/wix?keyword=partial+periodic+table+answers+key PDF link annotation
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/fakepalepekik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_60246d1f0ec2e.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/iha5mVf/bayliner_capri_1750_owner_s_manual.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/januvi.pdfIn PDF document text
    • http://raisinshub.club/rulidu3sr92.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/vJgf0ii/23746838561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_6011312f1fdfd.pdfIn PDF document text
    • http://italiahot.fun/66557008067ama8d.pdfIn PDF document text
    • http://muzoc.xyz/jean_pierre_garnier_malet_libros7m1k7.pdfIn PDF document text
    • http://normaa-id.com/will_there_be_a_wings_of_fire_graphic_novel_56tiwj.pdfIn PDF document text
    • https://mogivara.weebly.com/uploads/1/3/2/7/132712472/a003d.pdfIn PDF document text
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/6d06067.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/3ggjgjV/31727209063.pdfIn PDF document text
    • https://sexaluweve.weebly.com/uploads/1/3/4/8/134854061/7126042.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5fcc1c64c42cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_113ddfacfc1a4c688db8e35d9ca64633.pdf?index=trueIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_99f448e8544545a9a71f6e0d90f6e83e.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_de9ce7bdf0cb448d9228dfd2a19a03e3.pdf?index=trueIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_f78bf5d6ba9d433eb34b355dc26cffcd.pdf?index=trueIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_26d5bad1254f425596758edd5749ad14.pdf?index=trueIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_a88b66985ec84c608bf5f84bb6f5bb11.pdf?index=trueIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_a9955ae557034976b88a42b7474072e6.pdf?index=trueIn 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_off0000e767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 5464 bytes
SHA-256: c966a351b508101fa1e72ee0f111efd9b81fb15fba863b1f7aa5ac683d2f86f6
font_01_sfnt_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 10952 bytes
SHA-256: 5a222a8b5867728abb06a7e33fbb951e35d98c0167c84cc03db10533c6ed182c