Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcffaad7145cf0f8…

MALICIOUS

PDF

70.9 KB Created: 2020-11-11 09:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 495841ce644728ce981ad4090084644c SHA-1: 901f39b69094320c2e046d2926999f1fb7824b6f SHA-256: dcffaad7145cf0f86e69bfe74f76bf9de025a5fb64f18247b057db41fd44b0da
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://gettraff.ru/123?keyword=wsdm+2020+key+date In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5fa91f8f2103c.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/5945091.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/tikoweravisixu/74360207032.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/marisa_pare_american_gladiators.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/eastside_baptist_church_lakeland_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/acupressure_points_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119e9dd9-bd74-4191-9e3f-03f27277e2fd/begalejijon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d72f39-4ba5-409a-b132-d4b1b12077b7/77968101024.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/45430833237.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/lemuvunopijuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab23f29-aa88-468b-a786-52f6be344171/kara_kpr_narlktr_indir.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_off0000cbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE3 4820 bytes
SHA-256: 742d2ed625aebc0a63465526d1247231d38ab23609aa486c5cba9fe0de60fbc2
font_01_sfnt_off0000dc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC57 10888 bytes
SHA-256: 44ceff27a7510d55c54b93c2de895adf7b8bb1cd487f92e319f74c6332ed9821
font_02_sfnt_off00010129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10129 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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