Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0958fb8bc186c70…

MALICIOUS

PDF

68.7 KB Created: 2021-02-20 22:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f17a90cfda0e3382d6fc101f78c808c5 SHA-1: 506d53f673763d30b743c61e2efee4bef7dade9a SHA-256: a0958fb8bc186c7050fd5426f1b1b838bc26783602fe28a1104570e0d9fa9768
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=peter%20levenda%20twitter PDF link annotation
    • https://nubizuvilokimid.weebly.com/uploads/1/3/5/4/135401099/d84f1273c04.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/jhigfhg/52434889549.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzededoz/X7EIDP7/chef_papa_restaurant_story.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/pjaiePY/change_the_voice_exercise_with_answers.pdfIn PDF document text
    • https://latimemoniborij.weebly.com/uploads/1/3/1/4/131437487/pevifesovunutip.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/Hujfjio/70977269582.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/HXihCbM/68164916365.pdfIn PDF document text
    • https://vipefujalebir.weebly.com/uploads/1/3/4/7/134744486/4032077.pdfIn PDF document text
    • https://vajunepiw.weebly.com/uploads/1/3/2/6/132681590/ffb03bc0f802fc.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/hgg3lCs/android_tv_remote_control_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kapopajij/WiinigQ/protozoa_vs_bacteria_vs_virus_size.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/musoxifuvitalo/free_calendar_template_2018_september.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/ambareesha_kannada_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/kala_chashma_kala_tal_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/23873150991.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_off0000cffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFB 4796 bytes
SHA-256: e0e99f69d48a1a36f7fc999bee0fadb7dd580a79ac5dd7a493eaa3d174aa5a77
font_01_sfnt_off0000e067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 11144 bytes
SHA-256: 3b3f2c94b7f99d8f23ef3f754f49c536aa503a38b271bd97911259e4e0a90935