Malicious PDF — malware analysis report

Static analysis result for SHA-256 50820077a579b048…

MALICIOUS

PDF

73.6 KB Created: 2021-03-14 12:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f6abda760bd9ff2cc4383206e3037116 SHA-1: 2101f00a8056b7499748a4fb83c2723db2aabe2f SHA-256: 50820077a579b0481f447ebc2d5dbb6a69a0fe21fd03ad9b590c80527c05f1b6
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 0.9999

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://maypoin.ru/123?utm_term=inventory+ageing+report+in+sap+mm PDF link annotation
    • https://siwufofewexiv.weebly.com/uploads/1/3/5/3/135329456/mupeteti.pdfIn PDF document text
    • https://xivitazekovobun.weebly.com/uploads/1/3/4/5/134596583/76579e4e1a7.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/4e1f627cbf.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/8673256.pdfIn PDF document text
    • http://suxiwef.22web.org/67649075831.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/2869461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_602416cbf2fcb.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/6497a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405642/normal_5fdd2828d9eed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_b4825ec1667a406dbb577c5a856ced9a.pdf?index=trueIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_d47d2868b49c415da57ff25a5e5a5f31.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9ed6e3-59cb-4479-8840-56f69e127fde/why_is_my_search_history_showing_up_on_another_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed97e0f-8233-4965-8e13-ff6b0cd88e6f/50_shades_of_grey_soundtrack.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_6aaa296c305848f69924c8527c6aeabb.pdf?index=trueIn PDF document text
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_28f7e8d9095e469abd5cdba7521e3a38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76dacaa2-61d1-4811-adab-06d730a3a3f2/fezoputepo.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_5ce89e1a23784fbc893f3eba0e13f2d7.pdf?index=trueIn PDF document text
    • http://gefifeji.rf.gd/runuzagupenimotosorogo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE372 5208 bytes
SHA-256: 80f407338130d141a983053acb085df50e66ed7250678af34ac25877b48ae1e0
font_01_sfnt_off0000f528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 10540 bytes
SHA-256: ffb513af6f24f1b4371243a88ac4c1c2bd800c410dbabd47d81077788687fe9a

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