Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a2ea198e242219…

MALICIOUS

PDF

68.6 KB Created: 2020-11-20 16:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d45a9d0bf1e76c2ac8b74617303cd876 SHA-1: be10b3a727a8f743d263c409ff5944165937728b SHA-256: 33a2ea198e242219e03328ec136f0d8269f26374707764f0353cf3e2bfa9effe
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially obfuscated, contains text related to 'Aeroporto di fiumicino numero informazioni' and includes an external URI pointing to 'traffking.ru', suggesting a phishing or scam lure. The presence of numerous external links, including a link farm heuristic, further supports the malicious nature of the document, likely intended to redirect users to malicious sites.

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
  • 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.
  • 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://traffking.ru/aws?utm_term=aeroporto+di+fiumicino+numero+informazioni PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379854/normal_5f94d69cbb958.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/kusaxudatowada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462976/normal_5fa891e0e056e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_5fb291ecc314c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5fa18cacb2423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5fab9d04c990e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5f9c6a53b5688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5f96479769569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_5fa3599672609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5f97d171b972c.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/xefezesebusu/inquisitive_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/aiims_delhi_nursing_officer_answer_key_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f8aa78-f321-4e77-8631-55b95289800e/revorenuvokufeduzeduxiled.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/jetbox_apk_pc.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_off0000cbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCE 5132 bytes
SHA-256: 780071c9a1dc63defbb23afb3936754fae68c37d065490af1854a022e25931ac
font_01_sfnt_off0000dd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 12228 bytes
SHA-256: 815b396c185d9b1540b238039e800c9c012e311a1bf263957d8e3095d193fc41

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