Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0a009f5e83b6fd…

MALICIOUS

PDF

74.6 KB Created: 2021-03-05 15:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5638714f5add2ff33c7d7fd45801fcfc SHA-1: 7db2314e31959111f2f873b3fc17edc144995c36 SHA-256: 2d0a009f5e83b6fd5778c3d9ebfcd9f3b636b03f74a4c89a8ec7e404be9345ff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious content, likely phishing or a trojan. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://botokaw.ru/wix?keyword=toefl+official+guide+latest+edition
    • https://cdn.sqhk.co/doxutijewu/LjeZg9p/snappers_st_pete_beach_early_bird_menu.pdf
    • http://sovuradema.medianewsonline.com/dixukera.pdf
    • http://fuvesozufinefi.medianewsonline.com/revakewurarigarinazev.pdf
    • https://zekogogebiw.weebly.com/uploads/1/3/1/4/131453397/66da11ee2378.pdf
    • https://soxiwavarado.weebly.com/uploads/1/3/1/4/131437421/6965046.pdf
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/rufanap.pdf
    • https://darurirajilubi.weebly.com/uploads/1/3/4/3/134318819/fikonoworegu_gudurijigune.pdf
    • https://pabimoju.weebly.com/uploads/1/3/3/9/133997489/9217575.pdf
    • http://pogawubujogeje.mypressonline.com/jijabil.pdf
    • https://ropejanetim.weebly.com/uploads/1/3/4/6/134600341/8782593.pdf
    • https://xupemapimosow.weebly.com/uploads/1/3/0/7/130776757/zonokak.pdf
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/9ee5a224ae8fbe.pdf
    • https://cdn.sqhk.co/xibetevoxaj/ggeZ9ph/crazy_falling_balloons.pdf
    • https://kotirilu.weebly.com/uploads/1/3/4/3/134332744/keweradeb.pdf
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/1ade6c6.pdf
    • https://cdn.sqhk.co/kunimanujage/bijzlri/snes9x_cheats_android.pdf
    • http://wapividazofar.scienceontheweb.net/donivuzufifom.pdf
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/tumoko.pdf
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/tulepekimuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/334898a4-59a1-488a-a09c-ae4e938dfe7b/1943_farmall_h_value.pdf
    • https://uploads.strikinglycdn.com/files/993d2570-213c-4c75-93d3-97b15f65cbe8/the_old_woman_poem_summary.pdf
    • https://uploads.strikinglycdn.com/files/e546f9ca-6c13-45ec-8ef4-8271767d1daa/the_smurfs_and_the_magic_flute_characters.pdf
    • http://pabewuvuxaf.onlinewebshop.net/rovuxubu.pdf
    • https://uploads.strikinglycdn.com/files/4b043e2a-ef38-4007-8636-063878bff289/88917603532.pdf
    • https://uploads.strikinglycdn.com/files/a9f2d7f8-330e-4b66-9fd6-34a07581385b/avatar_comics_imbalance_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f0.bin
e5df1f6b1f3eab6146ad0c1a3d758c930a8f30875c51dbf6b94f8beb133f6cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 5040 bytes
font_01_sfnt_off0000f831.bin
fde7ea12f2eb05a9a9f0610160aff910d1cbb910bd42880a882c96078a946329		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 10864 bytes

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