Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86bef5b79a5cf70…

MALICIOUS

PDF

71.5 KB Created: 2021-02-16 03:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 38facfba5bdd193cbf6a414704d89312 SHA-1: 880e4280e7ac7f54896376c47427668721a37662 SHA-256: f86bef5b79a5cf70efdbcbbc7023208f63e394e5f6aabc693417708b4f0472c2
314 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vawegoti.weebly.com/uploads/1/3/0/8/130874218/dabugij-xikat.pdf.
  • 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/wb?keyword=what%20are%20marriott%20employee%20benefits In PDF document text
    • http://tiximixisasosa.iblogger.org/java_8u131_offline.pdfIn PDF document text
    • https://vawegoti.weebly.com/uploads/1/3/0/8/130874218/dabugij-xikat.pdfIn PDF document text
    • https://jajixawu.weebly.com/uploads/1/3/5/9/135992574/kipepowogutiko-korop.pdfIn PDF document text
    • http://volewug.iblogger.org/gajupumofetadazobaw.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/hhJjjhb/warcraft_game_fuel.pdfIn PDF document text
    • https://vivusujode.weebly.com/uploads/1/3/2/6/132682813/karugu.pdfIn PDF document text
    • https://simidolipuxemit.weebly.com/uploads/1/3/4/4/134486986/8355084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mugoxox.epizy.com/ashton_manual_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/abinaya_album_video_song_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/woveverijowelara.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/6796435082.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/bematech_mp_4200_th_driver.pdfIn PDF document text
    • http://kesekerezox.epizy.com/cbse_full_form_ki.pdfIn PDF document text
    • http://ruzizasasasami.rf.gd/biohazard_4_mod_apk_rexdl.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/anagram_poem_format.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_off0000da34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 5396 bytes
SHA-256: 6e073d6f641934325a295236760590eca762421a2aad53837a9c648f5fb77ec2
font_01_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 10836 bytes
SHA-256: f411f1ce03917fb2ab5c51a8f2c35120966e79b60f76e28f73e333efd0134c39