Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b19196b51485e07…

MALICIOUS

PDF

76.1 KB Created: 2021-03-11 12:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 47c8c7b9abc82d84aa7f0a002d0092e3 SHA-1: aee0a5705c5d04c5615f26b0a1cdada2a26af916 SHA-256: 1b19196b51485e07e24cbb330030769c8dc8b719e6ae5f24ae0e26e92e4cc50b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and link farm nature suggest an attempt to lure users to malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/award?keyword=another+day+of+sun+flute+pdf PDF link annotation
    • http://mizafaroremida.getenjoyment.net/14396352238.pdfIn PDF document text
    • https://jameropavide.weebly.com/uploads/1/3/4/6/134699307/46331f104.pdfIn PDF document text
    • https://rolutadaneked.weebly.com/uploads/1/3/2/6/132681657/wefud.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/a_primer_on_linear_algebra_herstein.pdfIn PDF document text
    • http://gabutetidik.22web.org/college_football_live_tv_guide.pdfIn PDF document text
    • https://wuzipagaxu.weebly.com/uploads/1/3/0/7/130776492/nipenovoxu.pdfIn PDF document text
    • https://rulusekiraz.weebly.com/uploads/1/3/5/3/135322703/8c9bcbd8e2.pdfIn PDF document text
    • https://supuniwugi.weebly.com/uploads/1/3/5/3/135317388/majof.pdfIn PDF document text
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/zusej-wumolav.pdfIn PDF document text
    • http://zovolexune.sportsontheweb.net/the_prayer_of_jabez_book.pdfIn PDF document text
    • https://komanogorolelew.weebly.com/uploads/1/3/1/3/131380356/fe1430b8622.pdfIn PDF document text
    • http://kilewigi.iblogger.org/blank_political_map_of_europe_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://12563b6f-2a3b-446c-9027-cab6e698e5df.filesusr.com/ugd/610d21_df8674cf44f84c838e046accb2dee3a6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05164671-f112-4dc7-8cf2-f85ee8419c45/71518243548.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_5fef441f2e3b40d6a0117d5893368585.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd63ed9-f824-4eaa-95eb-7f3ea2d979b4/74205472882.pdfIn PDF document text
    • http://gamupuzif.epizy.com/tewupagef.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_8a93825d538e4cf194ba5d5ff9ac4baa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe5f88b-ce90-42a9-9463-c63ef048eb8c/lg_front_load_washing_machine_le_error_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e8dd9c-683a-4ee8-9e63-71f8898fc1d0/89888716429.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_f23bc0ac583d42f9b6ea04a3358d40c6.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_744e4c721267434ab9724c89fea9625c.pdf?index=trueIn PDF document text
    • http://zupitatip.atwebpages.com/what_is_a_warden_in_jail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec68114-9681-4e73-b481-9bf6ce082a1c/rovuvoworibuvakumimebefel.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 5220 bytes
SHA-256: 29ccecc934b9fc11e00b5b01270c822686b259d5570ad3e17c7c04ed66a9ec3d
font_01_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 10272 bytes
SHA-256: a10d9336b9ca24e02dcd51acf03a8e322365a1d10b6d9174566594ac84389004

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