Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbf16030593ac60…

MALICIOUS

PDF

78.9 KB Created: 2021-05-09 20:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ca83661911ce42b18e774b03a55dd72b SHA-1: d4236a811680cef98f1b677185b722fd1656315b SHA-256: 8cbf16030593ac601aa60c1bce7167b02b6737834224c15cc6e9f5ef0c206af4
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, redirecting users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL, https://jottigo.ru/strik?utm_term=what+is+a+microwave+hood+combination, is the primary indicator of the attack pattern, likely leading to a phishing or malware download site.

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://jottigo.ru/strik?utm_term=what+is+a+microwave+hood+combination PDF link annotation
    • http://italywow.info/kitchenaid_mixer_k5ss_repair_manualy1bki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457008/normal_5fce07b23e562.pdfIn PDF document text
    • http://50offshop.pro/how_to_use_neckband_bluetooth_headphones8p7at.pdfIn PDF document text
    • http://eurofamily.pro/2011_jeep_grand_cherokee_overland_5.7_hemi_review3i8n3.pdfIn PDF document text
    • http://gallery-shop.site/seventh_day_adventist_church_songs_freewzpih.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451549/normal_6005a1f6ba2b4.pdfIn PDF document text
    • http://fastdonwload.space/layers_of_the_sun_coloring_worksheetv8zqo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_6055119ce799a.pdfIn PDF document text
    • http://doucheapp.xyz/why_is_my_invisible_fence_transmitter_beeping2xfi9.pdfIn PDF document text
    • http://creamwalls.space/how_hypothesis_become_theoryb1n7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461761/normal_6008eb0a50846.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/xisefowu/fokaxof.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/87076444038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cf658f-c8ec-4492-b8c3-8a991770723b/surawusoxog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca3317e-79ec-41f8-bab6-1566efcde809/75775426901.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/bosch_nexxt_500_error_code_e04.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/dedutizotobunuvunuxanu.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/30942795998.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/katun_video_song_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/81209523116.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 5452 bytes
SHA-256: cceb86df78b1c7c57a0549b5e89f12c3b52fcdef047ea32a5155086d33cc69b2
font_01_sfnt_off00010a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7F 10520 bytes
SHA-256: 305c06b4183a2afccfe4125505fc2fdb4335db32aed7292729dc3ae5a60a7d75

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