Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f53a8d88aedee8…

MALICIOUS

PDF

78.6 KB Created: 2021-03-22 08:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66c207fdb5bb67f583d03507a59e3455 SHA-1: eccd2f78c1a0a99c9c54ee201b634a22e5ac4894 SHA-256: 30f53a8d88aedee8663e3c5e5e5e25759bade39765f91b97755c237c03ac1d58
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, many of which are likely part of a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically for SEO purposes to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/award?keyword=arabya+rajani+comics+pdf
    • http://vovpomnim.ru/772096789021ayu2.pdf
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/ronon.pdf
    • https://cdn-cms.f-static.net/uploads/4470703/normal_602c9fc988e47.pdf
    • http://leririv.sportsontheweb.net/summer_baby_gate_manual.pdf
    • http://cryogen.me/braun_flavorselect_coffee_maker_manualy5wsl.pdf
    • http://sarkife.site/wujajolufotiwaf971k7.pdf
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/5892570.pdf
    • http://theraisins.pro/bob_evans_menu_prices_logan_ohiocgaoc.pdf
    • https://cdn-cms.f-static.net/uploads/4408853/normal_6025d07675c43.pdf
    • http://leftoutclub.com/57837520110nfq8k.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xukokumo.myartsonline.com/bhagavad_gita_complete_book_in_english.pdf
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_a7b290de31b54a15a12dace703a388c2.pdf?index=true
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_a2452c9762bc4ab1b28a87619a131741.pdf?index=true
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_2b47d46283ea4c01855f21eb8560ae97.pdf?index=true
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_aed827c98e824168b4f5bf39636615ed.pdf?index=true
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_cfb4ce73f5de4b298a0222b5dfa6f837.pdf?index=true
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_bb6c52a226d14454a80cefd31b8b9cae.pdf?index=true
    • 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.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e2.bin
0e6c3488b552fdec688f4d3c858b9ae9002e7a69352e51eba1a5fb7045e39a5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E2 5576 bytes
font_01_sfnt_off0000eac8.bin
871e06b3c92f7b412c6a72b6ce07a81c1c629c3fac684c79b5051171925aa7d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 10008 bytes
font_02_sfnt_off000108e1.bin
1e43d01f2d20e8dfeca849312336def0131c3d5c287cd8f3641e6fd34d017bc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E1 10700 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.