Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22d7115b46037c5…

MALICIOUS

PDF

81.3 KB Created: 2021-03-11 23:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8789227f18165e9a848fc36b379fe508 SHA-1: e88ce54108ef387aafa8c657d4c6ef5fc551aa02 SHA-256: d22d7115b46037c5343375752cfcd557e6ce0379ed67a39453dec1b81c914a48
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users. The presence of these links and the overall structure strongly suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://golowaki.ru/wix?keyword=kanji+social+link+days PDF link annotation
    • http://com-signto2.xyz/nixutulofovew7mbr8.pdfIn PDF document text
    • http://avit0.pro/34964716752j17ea.pdfIn PDF document text
    • http://meetsoda.pro/language_guide_italian_grammar5pxl3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479925/normal_5fed574b93151.pdfIn PDF document text
    • http://slamelina.website/paforurinumozafejovxt2dd.pdfIn PDF document text
    • http://salizurewaki.mypressonline.com/warriors_dont_cry_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423728/normal_5fd8798113818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455669/normal_5fc58793abe72.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/las_batallas_en_el_desierto_de_jos_emilio_pacheco_resumen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490272/normal_5fcbf12ab63c8.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/17733412942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_60346f2d9d767.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_fa1d7d07e32745e79c3394340a94795c.pdf?index=trueIn PDF document text
    • http://jabafujadopus.rf.gd/asus_xonar_dx_win_10.pdfIn PDF document text
    • http://suxikikafib.epizy.com/coherence_therapy_practice_manual_and_training_guide.pdfIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_d158d3af49934d2d94e3108d258092d1.pdf?index=trueIn PDF document text
    • http://kogotiru.myartsonline.com/zapenajixemarinilim.pdfIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_83c14f5e132641bfba824c40e39e669f.pdf?index=trueIn PDF document text
    • http://virirunabeso.rf.gd/video_from_twitter_mp4_online.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/biwadibetu.pdfIn PDF document text
    • http://gigixago.epizy.com/yanni_nightingale_piano_sheet.pdfIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_e43bc4a66ef24f89ab44baa452a55a57.pdf?index=trueIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_cd56cc7fb15a42e69dce818e481585d8.pdf?index=trueIn 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_off0000ed3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3F 5048 bytes
SHA-256: d475cacf216749711f7df875e26756d86665d5fd2236d8ec26df951a271ebb6c
font_01_sfnt_off0000fe90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE90 10400 bytes
SHA-256: b7eb38f4819a2abf59bbf7b17e38455b2e1c837837fb3698401bab25f1acf44c
font_02_sfnt_off0001224b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224B 16240 bytes
SHA-256: 281214d1119d96f3a8ebe36682ff3c94e77595198e0ed7d049f81fad77dcdf11