Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad747f9b61089cd…

MALICIOUS

PDF

74.9 KB Created: 2020-12-14 20:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 48acc00a7f7e1dab3881fa7e048cdd1f SHA-1: 9edc0dfc7bbd49633f4a885655300592700e8df1 SHA-256: bad747f9b61089cd757dce3c0c8864315ab606ab2dd3cfdbe7cd70ce47043485
254 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious redirection and a link farm, specifically pointing to a URL designed to lure users with a fake download. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL and the nature of the heuristics suggest a phishing attempt disguised as a software download.

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
  • 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.
  • 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://traffking.ru/123?utm_term=dragon+ball+z+dokkan+battle+apk%252Bdata+download In PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/jetupuduzovimo_fizilavoxi_dabufemizelet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc30d46116eb00e3c59ffbc/t/5fc967c7ab78533d4839e3e7/1607034824101/33897595594.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/standard_pcr_protocol.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/masez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8d024b06a7eb3fedc56/t/5fc11da7f8cdb769c60af105/1606491560653/musically_crowns_free_no_surveys.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc556af8787e879898964d2/t/5fd0efa6e0a3145b1d3c86b4/1607528359257/kejoxevetejog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d278c3-c8b5-46a1-84c2-9f2054c7e073/tefisulimorenujorakosaseb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17bf5104edf1d7784f42e/t/5fcc53ddc836a917f9026a5e/1607226337515/80769229858.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/jisabax.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/bakoxonologevoveloraxuva.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/vimeriz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc724bad64a3343a5f7119e/t/5fc8eb98fc44f34df66b1c4e/1607003032577/joker_music_mp3_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/learning_styles_2018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF18 5296 bytes
SHA-256: 14fd7011b42f6be23d06a1549b6b37e9d96c79ab21e457087bf30af83e48a6b0
font_01_sfnt_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 11176 bytes
SHA-256: 845ff08b3c5e4799130cc7dcc136ce4c7cc75aa6ab945979219046157b7b6cf4
font_02_sfnt_off000107ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AD 16136 bytes
SHA-256: bdc2bc4f5e798a784232a795332b8aa31f968e1bd6130ecf5aad562764645bd7