Malicious PDF — malware analysis report

Static analysis result for SHA-256 d376f339461d3561…

MALICIOUS

PDF

79.4 KB Created: 2021-03-04 10:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b688eb8443f2b54e659899a06b7fafff SHA-1: 6f9d619fe6ad66550b7a7b25e9e4d576872160a5 SHA-256: d376f339461d356134120d6855ecf5deede4fb80ba91bc5eb431d6c5477f4172
184 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The document body text, though corrupted, suggests a lure related to a non-existent file, likely to trick users into clicking malicious links. No scripts were extracted, but the PDF structure and URL analysis strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=lotus+notes+file+does+not+exist In PDF document text
    • http://manamuposa.getenjoyment.net/72417923743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366676/normal_6005052cc738c.pdfIn PDF document text
    • http://mijuxub.66ghz.com/encyclopedia_dictionary_free.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/17587808511.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/35817256029.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/hdgcvQp/kifujujomosatiwekutilikuj.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/sirokubopor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_5fe8f2c37f4b2.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dmDUlzL/zombie_roadkill_3d_game_hack_download.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/orca_quantum_chemistry_program_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wazewiput/iaUAhfn/72281158145.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/how_to_update_garmin_using_sd_card.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/what_is_the_meaning_of_phoenix_in_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/gchcYhc/28413662482.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxunuwozen.epizy.com/wysiwyg_web_builder_software_free.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/86342811411.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/how_much_does_a_rheem_furnace_cost.pdfIn PDF document text
    • http://lotawovuvowuk.rf.gd/legend_of_zelda_minish_cap_kinstone_guide.pdfIn PDF document text
    • http://lotawopobakitab.epizy.com/what_do_u_mean_by_enthalpy_of_atomisation.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 4604 bytes
SHA-256: 28ec184a3556f27bae1b879dca6b6403aaf2a6775217ba7d3319bf66b48cd066
font_01_sfnt_off0000f738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 10508 bytes
SHA-256: c5901adc1f695ede2a521073aae03a6de649a32f760204940e4f83ddb74c6cdc
font_02_sfnt_off00011b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6E 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87

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