Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1ac1bd51ce9bd0…

MALICIOUS

PDF

74.7 KB Created: 2021-04-01 06:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 055c93ad3a0e5b28d52cc26603909938 SHA-1: cecbeab295dcc9b0eeb832f4b7f8e2347c51a50c SHA-256: 1e1ac1bd51ce9bd0ceb0f6509839e550d58e02844173650d58ded8b1c8776186
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high number of distinct hosts, suggesting an attempt to obscure the true destination or distribute payloads across multiple sites. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://cdn.sqhk.co/lebudawojafi/khjHjeH/happy_birthday_mom_cake_pics_download.pdf In PDF document text
    • https://cdn.sqhk.co/bupabumo/hj7AghZ/juxepeligarevil.pdfIn PDF document text
    • https://cdn.sqhk.co/dulidara/gOkmjh0/najifik.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/3ThjNzd/camera_for_android_apk_download.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/jutejux.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/dJihse3/83133914879.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/hc4gigi/stick_war_2_hacked_cheats_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/bJhjQlb/31913027434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/Xr6F2PkPTcg/wb?keyword=can%20you%20track%20usps%20priority%20mailPDF link annotation
    • http://gejevebo.epizy.com/project_evaluation_matrix_template.pdfIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_ec2bbb5f3e194625a011cd2f56fb5f1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widiku/altium_designer_16_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/rivisag.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_35cce4c8bef14f05be685b43c6b78cf1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/achcham_yenbadhu_madamaiyada_songs_5starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/ruwalutexa.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/prezi_next_templates.pdfIn PDF document text
    • http://zinuwiwufimasa.epizy.com/basic_laboratory_techniques_in_chemistry.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_f12ba2ec638a44bc9c240417ef0063a5.pdf?index=trueIn PDF document text
    • http://daximogosamov.myartsonline.com/lodusudasisaxegibenolisi.pdfIn PDF document text
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_a5a0ab528e824c8592fe7d70f631b5da.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_off0000e80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 5152 bytes
SHA-256: 8373f0181309ab3fd6b346f0d2984f5907d055ddd6fa760507b441d0b853333f
font_01_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 10504 bytes
SHA-256: 29173739a5dd718a43fc74b165dac62c302ed0e3459a40bf9d80a5562e419ac7

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