Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80bc5af2400cf0f…

MALICIOUS

PDF

76.0 KB Created: 2020-11-10 12:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9dfa41c55615b67a6a0d5c765971ebd1 SHA-1: bc1c006e2994f8e30e1e248930c6a998907d7b04 SHA-256: f80bc5af2400cf0fcfda5503a5d1b8f30063adf0a8c1662a17426de226672dff
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector link and a link farm. It contains a large number of embedded URLs, with at least one pointing to known malicious infrastructure. The document body is heavily obfuscated and unreadable, but the presence of numerous links suggests an attempt to direct users to potentially harmful external sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://ggtraff.ru/aws?keyword=fahrenheit+451+clarisse+quotes+and+pages In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f93465d3ab1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_5f9e01622b9a9.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/7af8b2e72f872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_5fa8093db87bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5faa61e87ec0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5f9d7e30e8d87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_5fa93df6e4d19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f86f8ec77e7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_5fa76233ebc53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f90ec3962e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5fa2e5799c1cf.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://uploads.strikinglycdn.com/files/036c8f58-350f-47bf-9e4e-457629e10071/fupaxelonopadewilokanuse.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/capas_de_la_atmosfera_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/algorithmic_trading_chan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b58535a-2ff6-4c3e-a821-f257ea80bd32/24777023819.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_off0000d9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B1 5564 bytes
SHA-256: 0c593fbb0c5c7eb1ee0a045f99dabce6e1a9020131b168fb06404c318f436785
font_01_sfnt_off0000ec96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 13416 bytes
SHA-256: 46d26acd75d1741dbfa8339e339131cc2bb7ec23e4ec83fcc645b0e0a32a66ac
font_02_sfnt_off0001149d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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