Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf32c55f8d391f1…

MALICIOUS

PDF

87.1 KB Created: 2021-03-24 13:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1f6be35e15024bc9d5fd42aa39a2aa9e SHA-1: 96b1bcab6c4932fcda3a26216dd86c3e532d9ee8 SHA-256: abf32c55f8d391f13946160d03fd55bba0ba3469bc88f8b945903c9f5fc162df
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_UTM_REDIRECTOR_LINK heuristics. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to trick users into downloading further malicious content or visiting a phishing page, likely under the guise of printer troubleshooting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=hp+officejet+h470+mobile+printer+troubleshooting In PDF document text
    • http://tapidiv.medianewsonline.com/55175425302.pdfIn PDF document text
    • http://xeberul.mywebcommunity.org/bomaje.pdfIn PDF document text
    • http://gidepel.22web.org/buscadores_busqueda_de_informacion_en_internet.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/el_alfabeto_en_ingles.pdfIn PDF document text
    • http://mavogevuz.getenjoyment.net/pijivuxit.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/ansi_code_download.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/mitukogewovemabenu.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/can_t_take_my_eyes_off_you_piano_sheet.pdfIn PDF document text
    • http://xadazobisisim.scienceontheweb.net/british_accent_words.pdfIn PDF document text
    • http://jebifawulu.mywebcommunity.org/extreme_sports_vocabulary.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/fibowaj.pdfIn PDF document text
    • http://wuwudikosegukem.mypressonline.com/schwinn_recumbent_bike_270_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/muvazi/ganalulivesefemarubam.pdfIn PDF document text
    • http://minivenema.atwebpages.com/5109771497.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/ups_waybill_number_format.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/does_chocolate_keep_you_warm.pdfIn PDF document text
    • http://dufobirufo.atwebpages.com/24324026668.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/xovofobamerokulutolirevi.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/arikil_pathiye_video_song_mp4.pdfIn PDF document text
    • http://witesenigo.atwebpages.com/renewable_and_nonrenewable_resources_quiz.pdfIn PDF document text
    • http://xedavabawavela.onlinewebshop.net/vukenazazev.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/38982960307.pdfIn PDF document text
    • http://bapinusajix.rf.gd/82499673609.pdfIn PDF document text
    • http://domuromu.atwebpages.com/how_much_does_a_round_bale_of_hay_weigh.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/zirava.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001094c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 5588 bytes
SHA-256: f3b3bfce4ffdac84542089dbc30633d2716d793455ce56617c237f9ec72493a6
font_01_sfnt_off00011c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C36 10516 bytes
SHA-256: b627925e066a1ceec9124eb5a9997d9b6f3c6cfa46791c743ab54756f144c4c1
font_02_sfnt_off00014058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14058 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361