Malicious PDF — malware analysis report

Static analysis result for SHA-256 14568fa0eedaadc3…

MALICIOUS

PDF

73.9 KB Created: 2021-04-30 15:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 56845c51ede619b92fee5efc316096c7 SHA-1: 02d8ffec6cc63dded21de0784aad0b8498b48610 SHA-256: 14568fa0eedaadc34d374a7e8d3b3b1e075599f6180e9c9bfa26f834b73df291
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are identified as part of a link farm and redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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
  • 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/strik?utm_term=microsoft+xbox+360+controller+driver+v1.2+for+windows+10+64-bit In PDF document text
    • http://ita-bio.fun/857263262368ahl.pdfIn PDF document text
    • http://fresh-ita.space/govati98t5d.pdfIn PDF document text
    • http://stonersfranchise.com/dell_inspiron_17_5000_series_battery_charger4c9du.pdfIn PDF document text
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/314f42a45550e3.pdfIn PDF document text
    • http://fitokapss.xyz/76450786475rtied.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/2569232.pdfIn PDF document text
    • http://igclienteam.com/24892752460ddegk.pdfIn PDF document text
    • http://sevastopol.sale/sony_alpha_a77_manualuc0c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8b57e9d-e272-4783-b6f5-6420e6b93425.filesusr.com/ugd/886b73_3df7932c1970427c869be9f051cf4696.pdf?index=trueIn PDF document text
    • https://7d40d8d4-2a5c-4bfc-85f5-4808a9c864d7.filesusr.com/ugd/e745be_8df2ea531d6e4e748bc5c6936f82e5ad.pdf?index=trueIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_01a4ef52fb2e4023be36c6ac55c3a7f2.pdf?index=trueIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_cf0fa06d5349439181f7340290756f53.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e73ab0-c87d-4e29-90b7-e96e10ed99c8/dekomag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5f1c8e7-04e2-4bfa-9f6f-da63edacf037/warhammer-40k-codex-space-marines-laki-laking.pdfIn PDF document text
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_286cd8d19adb449ba7eb41d06e00b5cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/305a6f15-5172-4ace-a8cc-fa56dc44c71d/bolinoturu.pdfIn PDF document text
    • https://559ef5b4-38f4-491c-95f5-a6f57f0534fb.filesusr.com/ugd/1b862a_62cf870a311e46d0b6d3d4fee375fec6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/484a9282-3eca-4bb3-9442-ecd2dcecaff4/49957145011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178640ad-0295-4212-9b94-031ed45fd8ba/rival_8706_new_6_quart_electric_ice_cream_maker.pdfIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_473a8148dd494b8b920e290184419ba6.pdf?index=trueIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_3105a382002c4321aba2a8b441d55080.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_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 5968 bytes
SHA-256: d643917ea245897195306ac0f1b92261fb2ec479a2de4ef4a94e8d63b0f9eb6d
font_01_sfnt_off0000f557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF557 10660 bytes
SHA-256: 767e1ca5d4c1886b0ec9bb795ce73e5915b8499c9e521b9e769bfb646ad7fde6

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