Malicious PDF — malware analysis report

Static analysis result for SHA-256 a078e14ccb4dd8ca…

MALICIOUS

PDF

82.6 KB Created: 2021-03-16 20:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49cd0741481c0cfca8905ae30cf6e036 SHA-1: 18de6a2ab639e0070271ede886411835cd446580 SHA-256: a078e14ccb4dd8ca9f37cae35d13255c9002cee3f62b806ac667741e5bdb1fb9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-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://jumiwimov.ru/strik?utm_term=16+pulgadas+cuantos+centimetros+es
    • http://hookup681.site/jitterbug_phone_verizon1d45j.pdf
    • http://dhl-order.info/sukavelibekouqtfj.pdf
    • http://padlamadla.site/rekavidoxesoxotamavebesav094j.pdf
    • http://magazinrf.xyz/xolefegopapozinemkhc.pdf
    • http://klosheff.xyz/up_theme_song_road_edm_dancing_called3htmw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0fd1f0c0-566e-480b-b77c-2beb9427f2da/gasim.pdf
    • http://kateporabub.epizy.com/offline_accounting_software_free_full_version.pdf
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_d7bcb8cd12094c8f9a9515a005a17ded.pdf?index=true
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_33410824cbee4237919885271b06529e.pdf?index=true
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_840890a1e8fb429588433e36153f5f6a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5a798b28-d299-4009-92ea-f1f4a8b34ace/fusoxusujijawof.pdf
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_d74f10ad807343b891230cc2f2f50e19.pdf?index=true
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_3f2b5f7f8bf94e9c83cf55706956aaab.pdf?index=true
    • http://nufagogofuj.epizy.com/guwutoludegirowi.pdf
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_2f21d6b12b90447897fd040460b11454.pdf?index=true
    • https://uploads.strikinglycdn.com/files/526772b1-ef56-471f-9770-4b3f0c559caf/igloo_ice_103_user_guide.pdf
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_1727725f6a0c4307b48ad533736165e4.pdf?index=true
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_1c93684936a942de8ecb0dc33378158f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8db7a7c7-0624-411f-a341-c6af0e0d842e/84970254699.pdf
    • http://mimafesajasi.rf.gd/xonixunazena.pdf
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_00becf4cc9d04c9c822b66a1af7c4d86.pdf?index=true
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_d1712b481b3248b2bfbe7be6f36fc6cb.pdf?index=true
    • http://funadorexizuju.rf.gd/96536231065.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_off0000ecbc.bin
d10921aad10a709f84a7a51a51b80088da0baffd6b2f367244ae69713f0d23d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECBC 5504 bytes
font_01_sfnt_off0000ff5e.bin
41d148fae16d2f3dcf3ff9f7028758e79ce630482bda73fdce9b66c4b62d6164		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5E 11768 bytes
font_02_sfnt_off0001261a.bin
e8be64a599b4775abf69106d1ea2a605297721d8ccc8071fb3d67c702b09cfa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1261A 16100 bytes

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