Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab04f53bd6bef3c…

MALICIOUS

PDF

74.1 KB Created: 2020-12-19 11:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 94aabdc4ed1c7abff5d68a4c34e8a912 SHA-1: 125e5415bffdefa200213e79ae32faa82540b15a SHA-256: 5ab04f53bd6bef3c16308135c0fa9eabfc40319faaee26a8d78d960c897c1c69
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure and others to disposable hosting, suggesting a link farm designed to distribute malicious content or facilitate phishing. The ClamAV detection further supports its classification as a phishing trojan.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=stamina+manual+treadmill In PDF document text
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/2302760.pdfIn PDF document text
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/8387888.pdfIn PDF document text
    • https://dudumudisedaj.weebly.com/uploads/1/3/4/5/134591614/noxiruduvujav-sebozefefijupi-wasatofesiros-bivufawage.pdfIn PDF document text
    • https://xifofenanupov.weebly.com/uploads/1/3/4/8/134857182/vojudamodux.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/verebatupoxeb.pdfIn PDF document text
    • https://venumokup.weebly.com/uploads/1/3/4/8/134866871/kedumuvawevoguzuvat.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/2287881.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/884dbc61-f9da-44bd-84a8-df6f05caa396/asrock_z97_extreme6_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sirasu/jokem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a459aa-fccf-4a7e-9660-2bc7256633dd/complete_guide_to_fasting.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5402c6609fd0ee7ae1977/t/5fc665423c6ccf69f33a23bc/1606837570257/dead_zed_2_hacked_unblocked_weebly.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/82669713423.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/luperuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7a03cb-10d3-4d5d-acc4-27c632b76911/31499250194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed935a19-dd44-4c5d-9432-1a5033940336/cool_swords_mod_1.7.10.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_off0000e531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE531 4896 bytes
SHA-256: 1a7316306c65a57a17a93a560a5452a5d2df8e6058f0bcf3abfc4fcaf03e22b5
font_01_sfnt_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 11156 bytes
SHA-256: ef19521df19985899d5801ae4d65e8886465399e5372fce6b107ac1f0da6587d

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