Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea8dc1a0c548fca…

MALICIOUS

PDF

92.7 KB Created: 2021-04-05 11:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c23a3e9251c2ef44c574f4da323dd097 SHA-1: 2b8f5106fbd5b849f1f079be2fe27a28d4cabb81 SHA-256: fea8dc1a0c548fca5acf639361a92eff1404693077c0487a93ab37cd35cbdc35
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and contains an embedded URI pointing to a suspicious domain. The document body is heavily obfuscated, but the presence of an external URI suggests an attempt to redirect the user to a malicious site. No scripts were extracted from this sample, but the PDF structure itself likely facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=does+sonic+have+a+cherry+limeade+slush
    • https://static.s123-cdn-static.com/uploads/4374976/normal_5fc90deb046f6.pdf
    • http://salizurewaki.mypressonline.com/luzapok.pdf
    • http://koponegigat.medianewsonline.com/244631765.pdf
    • https://sitixibabu.weebly.com/uploads/1/3/4/7/134749551/502698771c.pdf
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/7dddf46162.pdf
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/potuzej-febikub-girebitudujov.pdf
    • http://bagomebefekixob.getenjoyment.net/43533604345.pdf
    • https://dawirusopu.weebly.com/uploads/1/3/2/3/132303146/d7779d7c16112a5.pdf
    • https://static.s123-cdn-static.com/uploads/4385434/normal_5fc968783cd9a.pdf
    • https://cdn-cms.f-static.net/uploads/4425912/normal_60461dcac9dcb.pdf
    • http://renakejopipelew.iblogger.org/define_abnormal_psychology.pdf
    • http://zugemenelil.medianewsonline.com/41648812208.pdf
    • http://kelimap.mywebcommunity.org/my_passport_ultra_driver_for_mac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zewixezix.epizy.com/90738055401.pdf
    • https://s3.amazonaws.com/xipavir/esc_guidelines_hyperlipidemia_2019.pdf
    • https://s3.amazonaws.com/wetowuzuxit/cane_self_defense_techniques.pdf
    • http://zomimuju.rf.gd/69873852919.pdf
    • https://uploads.strikinglycdn.com/files/e1b74c3b-f793-4009-ab12-42f59a7adb75/el_mundo_de_sofia_sinopsis.pdf
    • https://s3.amazonaws.com/lovomijelun/how_to_use_motorola_elite_sliver_bluetooth.pdf
    • https://s3.amazonaws.com/xowasosuf/jumekavabezenetarozel.pdf
    • http://vulemeke.rf.gd/will_there_be_a_movie_for_one_of_us_is_lying.pdf
    • https://uploads.strikinglycdn.com/files/3c313c49-13ab-42bf-a41b-6292d2053d8e/armstrong_pullup_program_beginner.pdf
    • https://uploads.strikinglycdn.com/files/a59879be-80d2-4455-b3ba-816bc964ca34/fatesededitesikaguvija.pdf
    • http://jajumuxepuj.rf.gd/illustrator_reduce_size.pdf
    • https://uploads.strikinglycdn.com/files/01984cad-600f-4d7d-bdd0-a2a095dd65ca/buzib.pdf
    • https://s3.amazonaws.com/rakabexozu/31443180389.pdf
    • https://uploads.strikinglycdn.com/files/6988f4bc-3c6a-425e-bea7-4ffd1d1c0ecb/how_do_i_get_to_my_router_admin_page.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_off00011489.bin
de4216abe589ba04eec83213d5349172554244a43719f605311fe0bb63a2c43a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11489 5340 bytes
font_01_sfnt_off0001269b.bin
cea8a3c74ede17bf23bfa96c6e7aafe93911435c559e389cdead3e003927641d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1269B 11404 bytes
font_02_sfnt_off00014d64.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D64 16312 bytes

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