Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72310f47e39a395…

MALICIOUS

PDF

109.9 KB Created: 2021-04-07 22:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 627d44e636f66263505656abea679533 SHA-1: ee9812d6d08918e37960a7008d7d2fda8d851588 SHA-256: c72310f47e39a395ac94e9f285342b0fa74e0ebc5b3be49187e56e18ff223074
134 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI redirection and ML classification. The embedded URLs point to suspicious domains, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious nature by identifying link farm characteristics on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/strik?utm_term=deepak+chopra+21+day+meditation+day+7 PDF link annotation
    • http://erogancolumbia.site/nikodubenulagijifeliwoq4vda.pdfIn PDF document text
    • https://gorogonib.weebly.com/uploads/1/3/0/7/130775466/kamokejefiti.pdfIn PDF document text
    • http://rawitotizoxuk.scienceontheweb.net/what_is_the_role_of_transition_words_in_an_essay.pdfIn PDF document text
    • http://glasshookahcatering.com/f2_audio_songs_telugu_freeak0j4.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/ubuntu_server_tutorial_for_beginners.pdfIn PDF document text
    • http://gukopujix.22web.org/lamokabigodisi.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/webul.pdfIn PDF document text
    • https://vewejefimubi.weebly.com/uploads/1/3/4/1/134108794/vefarosujuju.pdfIn PDF document text
    • https://tevetokin.weebly.com/uploads/1/3/4/6/134693627/ditapifokufaj-zisino-gufajigubidixew.pdfIn PDF document text
    • http://subfamjtii.site/36238240627w4oc6.pdfIn PDF document text
    • https://dojinutek.weebly.com/uploads/1/3/4/1/134108596/datalugekumofan.pdfIn PDF document text
    • http://tramlaweq.online/is_grubhub_free_deliveryxvozg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tegagikam.rf.gd/busedera.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/what_is_j_alfred_prufrock_about.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/web_to_converter_chrome_extension.pdfIn PDF document text
    • http://bazimiguzanuv.rf.gd/abc_tracing_worksheet.pdfIn PDF document text
    • http://vuvagebarib.epizy.com/calculus_derivatives_and_integrals.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/reroranipirosukotitero.pdfIn PDF document text
    • http://misibinebob.epizy.com/peteteguverunibujabudo.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/how_to_update_my_audio_drivers.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/california_critical_thinking_test.pdfIn PDF document text
    • http://memenusaduso.rf.gd/demajapozodaturawefame.pdfIn PDF document text
    • http://wawuzir.epizy.com/a_mi_me_gusta_a_ti_te_gusta_conjugation.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11334 6476 bytes
SHA-256: 526c5a2175551476bef9e67e23fc16d118bda5f5d89964818a68e3a853678add
font_01_sfnt_off0001233b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233B 5532 bytes
SHA-256: 3372db251b0f7005343a0566105f15c0a95be0f46cb07f6ad677b29a92c65b98
font_02_sfnt_off000135f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F0 16364 bytes
SHA-256: d7b19685ba63d9fc1f1140ec0b9d659fed417513d119edf1680f187a3327fdc3
font_03_sfnt_off000164ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164EF 10484 bytes
SHA-256: ee6b5b3324eb4357c65796b9daf54f5ad89fbda0797f9394de0b1e33315c6601
font_04_sfnt_off00018901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18901 16976 bytes
SHA-256: c25c70982bb1ce695ad838bc6d83af9cfcec7a955e9578481264c5413e82c7bc
font_05_sfnt_off0001a109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A109 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

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