Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54e0988c6958885…

MALICIOUS

PDF

78.6 KB Created: 2021-04-13 15:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d208baa1ae68b569cb82bf57361be976 SHA-1: 0b00419396274dbd9c86503f5d63c933c15c6b0a SHA-256: f54e0988c69588852f83debb230713197b88546284c4beb263756aeea445331a
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely leveraging a PDF exploit or social engineering to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • 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.
  • 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://nipisod.ru/strik?utm_term=make+me+a+cup+of+tea+in+french PDF link annotation
    • https://cdn.sqhk.co/jabisopomuxo/jdFmSjj/lixoxijagegareluzopabani.pdfIn PDF document text
    • http://bokifov.iblogger.org/how_do_i_connect_my_linksys_extender_to_a_new_router.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/fugjdjd/diana_her_true_story_book_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/hhgigFO/break_time_north_stadium_columbia_mo.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/dkhihgL/nudofijida.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/qasida_burdah_transliteration.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/axiomas_de_zurique_livro.pdfIn PDF document text
    • http://rikureleliv.22web.org/atoms_and_molecules_notes_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/yhhnC3y/casino_capitalism_meaning_in_english.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/79665273637.pdfIn PDF document text
    • http://sokadap.22web.org/computer_hardware_and_networking_course_in_sri_lanka.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/nazugug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b55c531-305e-4f2a-aa4f-9bd8a65f58b0/70120586975.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/74613035493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d6d4e14-a9f0-484f-89ef-8f78f5d29748/netgear_wnr2000v3_max_speed.pdfIn PDF document text
    • http://wiwekire.epizy.com/33243618827.pdfIn PDF document text
    • http://gozamud.rf.gd/compreendendo_o_behaviorismo_baum.pdfIn PDF document text
    • http://lekozuni.epizy.com/80734653295.pdfIn PDF document text
    • http://pamovoxe.rf.gd/kituviweso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f873ee-9c50-4761-8cac-1261ee74fb72/how_to_reset_att_u-verse_router.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/walmart_neighborhood_grocery_store_pharmacy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a199e398-556f-47b3-8b77-23680d80f8ce/delonghi_radia_s_oil_column_heater_1500w_trrs0715t.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/antivirus_avast_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/kuruvobawasaxaparefagoba.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/ubiquitous_language_template.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/where_can_i_watch_under_the_volcano.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 5116 bytes
SHA-256: b322e935154c90720d07889a455cbce4cbe5dc18a74e9859294ed81607154c58
font_01_sfnt_off00010576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10576 11084 bytes
SHA-256: a616e9245fd52914149e46521aaf27541b5633668cdc3ae887704ce417f331b4

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