Malicious PDF — malware analysis report

Static analysis result for SHA-256 f403302bdc389cb3…

MALICIOUS

PDF

73.9 KB Created: 2021-05-12 19:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6a9e741b5b0ceed01e6097e91148601a SHA-1: 5994616e8921b3aa6046d6d853eb135f635e67b0 SHA-256: f403302bdc389cb38c11d541ea938cf3df1e3d1659b10d823e83f1e7eeae0198
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=moto+g+3rd+generation+charger PDF link annotation
    • https://cdn.sqhk.co/lilodipu/f1wz7jW/papidenugofelapize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_6055a030610dc.pdfIn PDF document text
    • https://legoxadev.weebly.com/uploads/1/3/2/3/132302888/9b97f.pdfIn PDF document text
    • https://cdn.sqhk.co/fowoleleda/jJApghh/candy_jar_movie_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_60537768132e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456378/normal_604e9d6733b4b.pdfIn PDF document text
    • https://xakalawuvobovu.weebly.com/uploads/1/3/1/0/131071286/1eff2f51764ed.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/hRdUKij/87138063480.pdfIn PDF document text
    • https://vegonivi.weebly.com/uploads/1/3/5/9/135986737/palidaxid.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/bTapghR/16246219530.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/hjjdhc1/my_talking_lady_dog_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418191/normal_601e90c5a74b8.pdfIn PDF document text
    • http://vituloza.sportsontheweb.net/67615305801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_6037c4d7c4810.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/50009697081.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/67f651f4-e468-4b35-8349-7387ff3c8ade/amped_wireless_r10000_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27521fe9-f707-4466-b449-b28450c92edd/suvagizop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfc400b-7c8c-4809-8dc7-d5d3154c1d2e/76277815800.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_fed204238fa94e02a164ea20d5b76f0a.pdf?index=trueIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_3c6bd83616af4eea989b3a87b49ab297.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_off0000debb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBB 5160 bytes
SHA-256: 8fdd91754b71c1cdbf167d47d91249e32e812cc0ece578069cd89175dc3cd3da
font_01_sfnt_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 12036 bytes
SHA-256: cc1bac47a966422f901f9f9bec4f2e663ba421bd5d8447b65d922261a0a2457f

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