Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4d59057e504a21…

MALICIOUS

PDF

84.7 KB Created: 2020-11-14 04:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d000532c169ddc8fd79443bd720166a0 SHA-1: b8a9dce7d84cee3b02ef9e1ac2992a7a0f8af44a SHA-256: 1b4d59057e504a21914efde5d5ff76ff930834207582b7a68168a49570a7722b
262 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, including 'https://cctraff.ru/aws?utm_term=online+java+practice+platform', which is flagged as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to an 'online java practice platform' and uses urgency language. The presence of numerous PDF links and a high ML classifier score further indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cctraff.ru/aws?utm_term=online+java+practice+platform In PDF document text
    • https://vetovevigu.weebly.com/uploads/1/3/4/4/134486276/d26ab300a71c016.pdfIn PDF document text
    • https://pefasuvut.weebly.com/uploads/1/3/4/7/134716349/d99fca81.pdfIn PDF document text
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/4111619.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/13f7f22df9c84.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/nabifovu/living_electro_trance.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/mailbox_repairs_las_vegas.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/pudawimidevuripugil.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/over_again_roblox_song_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eede0c66-b17f-4bd1-bc0c-a48d699d4346/betulusiluzotare.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/birthdays_this_week.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/82561523087.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/bitowogoboxajito.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/sananga_eye_drops.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEA 5144 bytes
SHA-256: 834b806d28e30b0dc4208c32cbbdce445ab015e5aedde9b75bb836ced4e6c435
font_01_sfnt_off0001206a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206A 11180 bytes
SHA-256: 9a6c440345a7dc1cfed2fef43514444a4c1be679e7d9dae4e0b7c4de90339c7e

Open this report in the interactive analyzer, or submit your own file for analysis.