Malicious PDF — malware analysis report

Static analysis result for SHA-256 9464501685bc627e…

MALICIOUS

PDF

82.2 KB Created: 2021-03-20 17:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ef17063a48e681205d877d67e669150 SHA-1: d1d46374a42b1f9625242064aa3e74e82a09bf14 SHA-256: 9464501685bc627ec2406dab8c1f213c51634f32e5b2d5acae9daca21e69b482
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for downloading a PDF, likely containing malware. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

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://golowaki.ru/award?keyword=alcoholismo+en+guatemala+2020+pdf
    • http://cmb-accueil.com/angular_6_tutorial_franaisss9jt.pdf
    • http://imedo.ru/88397622416xkro.pdf
    • http://classkaod.ru/wexizixomukf6coi.pdf
    • https://dunelakanova.weebly.com/uploads/1/3/1/4/131410870/c2eb0499ef6f.pdf
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/8621484.pdf
    • http://pigigozoruda.mypressonline.com/ryobi_10-inch_15_amp_table_saw_with_rolling_stand.pdf
    • http://prognoz-football.club/raruwagimewabza.pdf
    • https://gorokawuse.weebly.com/uploads/1/3/4/4/134489158/5142977.pdf
    • http://spoonnumberone.xyz/ross_stores_opening_hoursl8ab1.pdf
    • http://vipmanmarket.space/the_hobbit_movie_download_in_tamil_dubbed_tamilyogi1iw8g.pdf
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/6837546.pdf
    • http://hidver.com/nordictrack_t7_si_treadmill_reviewm5am5.pdf
    • https://nobenala.weebly.com/uploads/1/3/4/3/134348336/dorawetaropeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_c497a240e6f14a9fbd44e9dffead899d.pdf?index=true
    • http://jofikuv.atwebpages.com/20770876060.pdf
    • https://s3.amazonaws.com/gebukil/tudovizosi.pdf
    • https://s3.amazonaws.com/tidigudetefumof/29536098075.pdf
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_dc39f55d1ee84b3585108db673dacb5b.pdf?index=true
    • https://s3.amazonaws.com/lurutopobi/rt-ac68u_aimesh_firmware.pdf
    • https://s3.amazonaws.com/wazotojemov/turafejomele.pdf
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_a84a6bae828945e49c5128b6ba902589.pdf?index=true
    • https://s3.amazonaws.com/degagaziv/kuvenujobu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b9.bin
53e855f4cdb15e204b09054921cbc3a1a9924e83f683783f0bec34d53a33a04b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B9 5736 bytes
font_01_sfnt_off0000fd1c.bin
bb1331ba8ed6c2dae95d658b65a99f5d66fdf2d2621be172d161785e3c546a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 12100 bytes
font_02_sfnt_off00012489.bin
b118ad4a5f0f66e944d0a6e82a0dad6050c27e77cb1eabf64d07f40874ae21b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12489 16080 bytes

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