Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a63609a0cc87f9…

MALICIOUS

PDF

275.3 KB Created: 2021-06-12 15:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 836d7a652032f25bcd51fe014e36cb71 SHA-1: d804db4e774359bb7893423dda5bcd451506abf6 SHA-256: 62a63609a0cc87f99267033d8be9582cbd454f361651e24faae0b5a3835b4fc1
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to language learning materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9729

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://krisoc.ru/pbw?utm_term=minna+no+nihongo+shokyu+2+translation+%2526+grammatical+notes+pdf
    • https://static.s123-cdn-static.com/uploads/4472760/normal_5feb0d30af6d4.pdf
    • https://zabaruwizugode.weebly.com/uploads/1/3/4/5/134596412/0c82b8f.pdf
    • https://zivogozupitis.weebly.com/uploads/1/3/1/4/131406352/5988275.pdf
    • https://static.s123-cdn-static.com/uploads/4466153/normal_600003b46050d.pdf
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/0b7201bd7eb60.pdf
    • https://cdn-cms.f-static.net/uploads/4473890/normal_603500a78eaff.pdf
    • https://cdn-cms.f-static.net/uploads/4368467/normal_603e627bb53e9.pdf
    • https://cdn-cms.f-static.net/uploads/4468819/normal_5fd80628e2d23.pdf
    • https://cdn-cms.f-static.net/uploads/4374682/normal_600fec70218f6.pdf
    • https://cdn-cms.f-static.net/uploads/4484820/normal_606b7a28a5dea.pdf
    • https://cdn-cms.f-static.net/uploads/4493578/normal_60114c76a64ee.pdf
    • https://xizilajonufu.weebly.com/uploads/1/3/4/5/134528384/piwumulunu.pdf
    • https://gununoneku.weebly.com/uploads/1/3/4/3/134309052/nosinune_rewumeb_nefagaxekaxavef.pdf
    • https://cdn-cms.f-static.net/uploads/4409405/normal_6035c144e65d6.pdf
    • https://static.s123-cdn-static.com/uploads/4370275/normal_5fdce5a4587ce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://fedorahosted.org/lohit
    • http://mizelabe.pbworks.com/f/how_to_chick_fil_a_rewards_work.pdf
    • http://wodupabizel.pbworks.com/f/77419251166.pdf
    • http://denakubi.pbworks.com/f/harley_quinn_full_movie_online_free.pdf
    • http://popuwepux.pbworks.com/f/tintin_and_the_picaros_read_online.pdf
    • http://vatojorisa.pbworks.com/f/42082104454.pdf
    • http://fepewuwakow.pbworks.com/w/file/fetch/144487617/rise_of_the_super_germs_science_world_answers_september_17_2018.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://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003699e.bin
100e88947bd501e6316d1a0953363098cdb11917802b0f596b91c7d25db34902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3699E 26876 bytes
font_01_sfnt_off0003bef9.bin
f21a887228d38fbb62043aaaee2e8a6dd2bae22c6a75a903c1d24a58d08af6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BEF9 5248 bytes
font_02_sfnt_off0003d0dc.bin
5aa24f35d9b5234840cab264d23ed952c1e4d7d00c490f7184a1184743430223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D0DC 5972 bytes
font_03_sfnt_off0003e020.bin
c2ded52b864fc006f6cf4ed88d7c9de99b18a29fa5f15b37841c8bc69dbcdca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E020 18732 bytes
font_04_sfnt_off00041a42.bin
783792e77e2b54c6d3f5530a5b78cb2b5ae172c6a78a9d40b05c3b3f58c29b94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41A42 17204 bytes
font_05_sfnt_off000433ec.bin
767a3be232117f13a302c99feaae426ab7672fc476bed27e099bc03d76ff4939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x433EC 2792 bytes

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