Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b4db0b39d9b4bd…

MALICIOUS

PDF

76.1 KB Created: 2021-03-29 18:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dd5204606c0439c61610662dd8c31368 SHA-1: bc956b143f65056dc657d90382fb9c0e0e5d9f4f SHA-256: e5b4db0b39d9b4bd842c4efe4e4f95cef56ad51382b756f54862a3601175958f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains an embedded URL that redirects to a suspicious domain, indicating a likely phishing attempt or malware distribution vector. The document body is heavily obfuscated, but the presence of a redirector URL strongly suggests an attempt to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=how+long+can+i+keep+green+smoothie PDF link annotation
    • https://cdn.sqhk.co/pozigafo/gguhhhC/jonote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_60501cf3754ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443819/normal_604d8d29ec553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_6015cc677ca63.pdfIn PDF document text
    • https://cdn.sqhk.co/viwitukaz/hbbgigf/corel_draw_x5_crack_serial_keygen.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ehbq5ja/this_means_war_song_gospel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_604dc76f8305f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5ff7a12a35a4d.pdfIn PDF document text
    • https://cdn.sqhk.co/xetajikok/qhhdLjc/48270764863.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405208/normal_600634c94a467.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/eha64hj/tulerafuretapatiri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420927/normal_5ff506bf108c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460471/normal_60257f74ae8c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f193c6c2-d001-4d2a-9e3c-763cc2bca8bc/how_many_red_aces_are_in_a_deck_of_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/30056129574.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/free_levey_jennings_chart_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/what_age_does_rue21_hire.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/68289138529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aab9ad0b-e3bb-46bf-b04d-bceb276e3ae1/33096847412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a42a380-2465-4cb5-9dbf-e982214291a1/jumping_the_broom_movie_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/rofabudodedamuf.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/civil_lawsuit_answer_template.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/beyonce_irreplaceable_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/maik_bangla_natok_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40b89e3c-bc95-4674-9219-6ef71987d243/lupagurenitiw.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/sportdog_bark_collar_replacement_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374bed62-a038-433d-a318-4d418b455ca2/lamborghini_aventador_roadster_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/61611742576.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_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 5464 bytes
SHA-256: 7e948656d75d75383172dd47547dde756eb9eb1d4a939b6f59a8a40299c76715
font_01_sfnt_off0000fbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF1 10800 bytes
SHA-256: a9de3f0460e84b5beb68dfb07bf2c89f419a070e4f8c513df6485da2da24c3ef