Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c307c7e70ae9fb1…

MALICIOUS

PDF

74.8 KB Created: 2021-01-21 08:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0ef4f474010c89738ea4ea4560413eb5 SHA-1: d60a38d78d209e43abb3515c4c20a20741d5c24d SHA-256: 2c307c7e70ae9fb14c89d440bea93e5c0454b073748a2831c14283cee0dd7de7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one pointing to 'jottigo.ru', suggests a phishing or scam lure. The document body, though heavily obfuscated, contains metadata related to 'Pg tips tea' and 'wkhtmltopdf', hinting at a potential social engineering pretext to drive traffic to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/123?utm_term=pg+tips+tea PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454306/normal_5fac601d857a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_5faf55ead2c76.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/hhgidig/nearpod_app_store.pdfIn PDF document text
    • http://sipamuxagiporen.iblogger.org/brookstone_projector_app_for_android.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/xedotos.pdfIn PDF document text
    • https://rewumakabaw.weebly.com/uploads/1/3/4/8/134856880/1d4b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451954/normal_5fbbda72a4fd9.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/iaXOgiC/zibijosebusejeguzejak.pdfIn PDF document text
    • https://bileravufal.weebly.com/uploads/1/3/4/7/134749654/daviwokugawuxim.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/zesarazivobatode.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/1ggiiia/24782830767.pdfIn PDF document text
    • https://cdn.sqhk.co/tavolimogid/gi6W0ii/43763759015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f8b30033ca76.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
    • http://gefuxexo.epizy.com/37676985223.pdfIn PDF document text
    • http://zetitovafe.rf.gd/pimaxekelujipogomapilado.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/ignou_admit_card_june_2018_exam.pdfIn PDF document text
    • http://sikofus.epizy.com/best_online_coding_platform_for_beginners.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_off0000db0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0A 4432 bytes
SHA-256: 962a75460aa85e010e1ae14f65af80785b62f2410341a6d138232ad684fe0627
font_01_sfnt_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 11112 bytes
SHA-256: 457de2b98f822d5e0e0c855822c99a31412329e090ab51aeee2d04c94191d468
font_02_sfnt_off00011049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11049 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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