Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb0965bc6f9469d…

MALICIOUS

PDF

74.9 KB Created: 2021-05-06 20:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d2c31ad1c37c74e86008781d4d9eb7cc SHA-1: d2fdb733d4780bee05fdbad88ae34922a186a8ac SHA-256: 5eb0965bc6f9469d66d9164aed369791042279aa7d65649835b2acbfd18e007a
136 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-severity 'PDF_SEO_UTM_REDIRECTOR_LINK' and a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URL, https://ponafet.ru/strik?utm_term=what+is+us+army+salary, suggests a phishing lure related to salary information. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall pattern points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ponafet.ru/strik?utm_term=what+is+us+army+salary PDF link annotation
    • https://rolarijigajegij.weebly.com/uploads/1/3/1/4/131438579/6841385.pdfIn PDF document text
    • https://sakavikonur.weebly.com/uploads/1/3/4/8/134854141/winerabixone.pdfIn PDF document text
    • http://rankingcoach-apps.com/is_leap_year_on_netflix_australiaz6z8o.pdfIn PDF document text
    • https://motixovelubebov.weebly.com/uploads/1/3/6/0/136085904/zozan.pdfIn PDF document text
    • http://avit0.cc/10322851796zcsrh.pdfIn PDF document text
    • http://tivepijezar.22web.org/holy_bible_catholic_version.pdfIn PDF document text
    • http://tosety.xyz/rpg_maker_vx_ace_tutorial_deutschv1r9a.pdfIn PDF document text
    • https://begafirezudafo.weebly.com/uploads/1/3/1/4/131438667/fefune.pdfIn PDF document text
    • http://alex-chekalev.com/1581424756265nsf.pdfIn PDF document text
    • http://chaptejvxz.fun/davuwy1ca5.pdfIn PDF document text
    • http://thefortykuti.com/xanusimimivademjjcn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligumawi.epizy.com/ap_reorganisation_act_2020_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/kematunazozi.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/what_is_the_reason_for_police_brutality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5504ba4a-22b6-40e6-b0f2-21ea3090d66b/thermaltake_core_v1_cube_case_schwarz_mini_itx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228dff25-6e44-4179-81fd-9e74e8d97fc6/defending_jacob_apple_tv_how_many_episodes.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/86390465805.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/nilob.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/91202700603.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_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 5040 bytes
SHA-256: 25e674d6b45aa17dc75074e731f465a274d4021c5734ab7833f5695b6a9d5e25
font_01_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 10144 bytes
SHA-256: d17a2b9fb0ca8101dcb9d878d6658060fb7b617cbc0215672aa0808ea4df3a8d