Malicious PDF — malware analysis report

Static analysis result for SHA-256 12346315fde7ce45…

MALICIOUS

PDF

82.1 KB Created: 2021-02-10 16:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2a068f0ad5d4b837de781e3f2f16262b SHA-1: 4c2f726f49513ddc34f15b2ade4282fef1bf4fb9 SHA-256: 12346315fde7ce4538f2ac3f5a155c2f0ad8b57b4a290bacc7e337bb2fd628a9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The PDF structure also shows duplicate object bodies, a common obfuscation technique. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=rob+dyrdek+dc PDF link annotation
    • http://domavera.ru/baleadas_honduras_pollo_con_tajadas9hzs6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5ff506f5dc08c.pdfIn PDF document text
    • http://nigasheff.xyz/859751542927m75m.pdfIn PDF document text
    • http://yognat.space/zombie_apocalypse_moviedhix5.pdfIn PDF document text
    • http://ins.expert/wobujilleejw.pdfIn PDF document text
    • http://naturmilans.fun/xufepobidukezoforef5s3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_601787055f92f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443326/normal_5fe7a11ce910a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373264/normal_5ff85571a6e1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368492/normal_5fec463c32873.pdfIn PDF document text
    • http://crawlmqyu.space/55292833346p5kpu.pdfIn PDF document text
    • http://denizan.com/mitosis_vs_meiosis_worksheet._doc8qojn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446166/normal_5ff76f05bb5bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_600d3749ee096.pdfIn PDF document text
    • http://e-sparks.ru/96655872210joj61.pdfIn PDF document text
    • http://teren.fun/prodigy_level_100_hack0q5p2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381082/normal_5ffddf96ef9cd.pdfIn PDF document text
    • http://twitter-center.com/rijodalipitesunajrike.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_60052506c7af5.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/wutezigojuxi/natural_logarithm_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/12755997473.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/printable_calendar_template.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_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 4828 bytes
SHA-256: 449c68cd1844543d4df67ff26e8c0baa8e70badaa54d2f6e0fc8b092cb3cd73a
font_01_sfnt_off00011521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11521 11092 bytes
SHA-256: af6508481ebe36c8be2f6395de82fc9ed3da652635eafd8ca0ffc372e51379a5

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