Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce37ce8b6936471…

MALICIOUS

PDF

96.7 KB Created: 2021-03-18 00:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc2f793a887d770b3d72a9801043cd75 SHA-1: 2a5dabb04c9a0e95bbea45c438c4fa65f7105aa0 SHA-256: 3ce37ce8b69364719077b19ccf12dfbe1da330d0b66b1fe1ff4a6523be79ad23
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a large link farm. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL 'https://druttle.ru/wix?keyword=nba2k+apk+mod' suggests a lure to a site potentially distributing malware or engaging in phishing. No scripts were extracted, but the PDF structure and numerous external links point towards a malicious redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://druttle.ru/wix?keyword=nba2k+apk+mod
    • https://sixofufi.weebly.com/uploads/1/3/4/3/134375841/wovasofefasaxifuvu.pdf
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/73eb2ed5945deb.pdf
    • https://kapefamutom.weebly.com/uploads/1/3/4/8/134849172/papubijofipizin-narusa-pobasuzenaluk-likutomuwerez.pdf
    • https://xifalazixaxidig.weebly.com/uploads/1/3/0/8/130874217/sujejuwopalalarudo.pdf
    • http://saporik.scienceontheweb.net/10222747162.pdf
    • http://mejumeroxara.mywebcommunity.org/capacity_management.pdf
    • https://jagevugabawe.weebly.com/uploads/1/3/4/6/134631244/ae2bf.pdf
    • http://kozidozilujivox.getenjoyment.net/sat_subject_test_math_2_score_calculator.pdf
    • https://pafajawu.weebly.com/uploads/1/3/2/6/132682051/2657608.pdf
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/8474012.pdf
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/5061665.pdf
    • http://robugipunebib.mygamesonline.org/buxesitakokubamumadefa.pdf
    • http://zivarejewetuga.22web.org/innova_3120_diagnostic_scan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/190ce227-6c10-4ffb-84e5-ae472b6a30d7/maya_angelou_poems_still_i_rise_video.pdf
    • https://uploads.strikinglycdn.com/files/dc7ffb47-8d75-4824-a463-f9b2e3862ff8/mebexomazutujesibaje.pdf
    • http://zisoramemib.rf.gd/60580779362.pdf
    • https://uploads.strikinglycdn.com/files/72bdddfc-ccc8-46cb-bf13-3f6799ef3b6d/2nd_grade_multiplication_worksheets_free_printable.pdf
    • https://uploads.strikinglycdn.com/files/716f821a-ad7b-4181-9ed3-b11a64270699/pejibexolokipagagekomi.pdf
    • https://uploads.strikinglycdn.com/files/3f2061a9-45e6-42a1-a127-473aa37a0ca8/acer_aspire_e15_laptop_specs.pdf
    • https://uploads.strikinglycdn.com/files/c584572b-287a-49f6-a9e8-f62e5850aea4/893361526.pdf
    • https://uploads.strikinglycdn.com/files/b08db1e9-dc61-4b1d-9db8-d0dde4c4dae5/53506899817.pdf
    • http://fawikinego.myartsonline.com/cambridge_igcse_computer_science_study_and_revision_guide.pdf
    • http://vinetewexe.epizy.com/independent_audit_report_for_ay_2019-_20.pdf
    • http://sasuwirakib.rf.gd/75853164950.pdf
    • https://uploads.strikinglycdn.com/files/e2339fda-b176-4d4e-878f-3c090bf5f873/58202817203.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb5.bin
0b603db4d89c5caae038441ea0c935493bb4fef0fab3450211780c1478ec8c14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB5 18764 bytes
font_01_sfnt_off00013365.bin
ea503d1111e1940a275bef1ee2c4e857696c8f996d172b59370876ca9c5c2d39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13365 5104 bytes
font_02_sfnt_off000144b1.bin
8b88185fb1caa19b127db774f1e773b8ec41d1394bc7b72cd727186061f48d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144B1 2248 bytes
font_03_sfnt_off00014f04.bin
838e268a557c5f24f3fd5739b79e6af86598d7aeb05d4ed345ac7f82d812c6da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F04 11112 bytes

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