Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf05cdc1e23d0982…

MALICIOUS

PDF

63.5 KB Created: 2021-01-28 11:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 952014938c002f265cd386b9f96fae35 SHA-1: b81189bc8d5c3e21386e60dcf528ce642313fdf8 SHA-256: bf05cdc1e23d0982e9ed3d93b223c9aa3143a69e40656da75ddfd25993fc2f6d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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/wb?keyword=retro%20iphone%20wallpaper%20tumblr PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469358/normal_600942f994ca0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fca42d17e015.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/wipawibamomas-jiduvimodu-wejovutujejew-bosufuwikeken.pdfIn PDF document text
    • https://dexidete.weebly.com/uploads/1/3/5/3/135394420/ritewelikafolud_bobafer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446398/normal_5ff29dbabccea.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/sifawekujiki/cognitive_behavioral_therapy_for_ocd.pdfIn PDF document text
    • http://kapejuw.epizy.com/navy_uniform_all_weather_coat.pdfIn PDF document text
    • http://sabozet.epizy.com/app_lock_fingerprint_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/white_christmas_flute_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/rom_android_9_para_j7_prime.pdfIn PDF document text
    • http://lekowezitodog.rf.gd/28756246311.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/bexekuwedababitugeli.pdfIn PDF document text
    • http://mejizemobimoli.epizy.com/wrong_turn_2018_new_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/hey_jude_guitar_chords.pdfIn PDF document text
    • http://pipovafalalum.rf.gd/star_interview_preparation.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_off0000bd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD15 5120 bytes
SHA-256: 2023dc70352c099122d590a0460fb892d4c41c639976f59ab5f21ecc64515c9f
font_01_sfnt_off0000ce68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE68 10256 bytes
SHA-256: 63cee026d3f14f087d7f5e87d9a342899e49f13f963872c371c8884f7bbec44a