Malicious PDF — malware analysis report

Static analysis result for SHA-256 95280143790a7202…

MALICIOUS

PDF

74.9 KB Created: 2021-03-25 07:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f81457c6778f17f2e2709968c9c01d17 SHA-1: 9c16de8cb04097a599e1c953041573357f1193cc SHA-256: 95280143790a7202cb5938819f1ab41c9ff5c5511f01a595814113de29313b7f
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document's content is minimal and appears to be a lure, with the primary function being to host these links. The presence of a PDF_SEO_LINK_FARM heuristic firing indicates a high likelihood of this being a phishing or malware distribution attempt.

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://bologen.ru/award?keyword=amelie+sheet+music+book+pdf PDF link annotation
    • https://cdn.sqhk.co/xokipuxat/5genDpv/hanzo_tips_and_tricks_mobile_legends.pdfIn PDF document text
    • https://vapevaka.weebly.com/uploads/1/3/1/4/131407737/banojexanofife.pdfIn PDF document text
    • https://siwepuxerit.weebly.com/uploads/1/3/0/7/130775843/vewodem.pdfIn PDF document text
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/senitiz_gejebufuj_kotana_boxofaposuratet.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/Glctgei/superhero_tycoon_simulator_roblox_mods.pdfIn PDF document text
    • https://korenumotijele.weebly.com/uploads/1/3/4/6/134687452/vejuxopap.pdfIn PDF document text
    • https://dekixemexiline.weebly.com/uploads/1/3/4/4/134497281/07359f926476a80.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/xetepu.pdfIn PDF document text
    • https://cdn.sqhk.co/saboretiki/jhcAagc/trap_bunny_bubbles_song_tiktok.pdfIn PDF document text
    • https://sibotapitagota.weebly.com/uploads/1/3/4/3/134378411/1705417.pdfIn PDF document text
    • https://losasogewago.weebly.com/uploads/1/3/1/4/131437886/9332098.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/91b53.pdfIn PDF document text
    • https://fepuvagugi.weebly.com/uploads/1/3/4/7/134767339/nesoxixumijolofe.pdfIn PDF document text
    • https://bajixaxazuxu.weebly.com/uploads/1/3/1/3/131383864/weleputoxamelek.pdfIn PDF document text
    • https://fenutirixe.weebly.com/uploads/1/3/4/6/134640366/8903046.pdfIn PDF document text
    • http://umdtheatre.ru/9431906406944tan.pdfIn PDF document text
    • https://tawedituja.weebly.com/uploads/1/3/4/8/134864040/aa8355693ec6f11.pdfIn PDF document text
    • http://daating19.site/25431518200tr1ic.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/ginTjbg/business_standard_newspaper_delivery.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daniwodug/47338077169.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/english_rap_bass_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/bella_ciao_ringtone.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_off0000e74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74D 5284 bytes
SHA-256: b2e51a34d6f50b40eb57ba46ee5c20229eecd7c22e6ed78c3a4479cb26cef057
font_01_sfnt_off0000f926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 10956 bytes
SHA-256: a28db7007ed4998b00ee22e7c3c29edbb8226ff3acc7cf1d5296453df67e5b86

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