Malicious PDF — malware analysis report

Static analysis result for SHA-256 749eaf701b77d25b…

MALICIOUS

PDF

76.2 KB Created: 2021-04-30 03:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7cfc6087edd41547579470ca2020f5cc SHA-1: f8bccac17e52bedee5ecaece78e12c7f7f537f01 SHA-256: 749eaf701b77d25b5eb8d4ab2bfe6a1674b3096628581dba9d2449a628a254f2
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, including one that appears to be a lure for resetting a tablet. The presence of a link farm on disposable hosting suggests an attempt to distribute malicious content or conduct phishing operations. No scripts were extracted, but the PDF structure and external links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://leonvi.ru/strik?utm_term=how+to+reset+my+trio+tablet PDF link annotation
    • https://cdn.sqhk.co/saboxiwago/5ifnhgy/65115960869.pdfIn PDF document text
    • https://cdn.sqhk.co/larivowap/jeMj2hd/rodutipimipojumipepo.pdfIn PDF document text
    • https://bemawavopul.weebly.com/uploads/1/3/4/6/134692962/kiretadofivudu_ropaxopaje.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/eja1Eji/sample_business_plan_executive_summary_for_a_restaurant.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/6cXgiid/fejerofugalaxu.pdfIn PDF document text
    • http://remontvorot24.com/50228728216a8t6u.pdfIn PDF document text
    • https://vanuludegevu.weebly.com/uploads/1/3/0/7/130776818/5498699.pdfIn PDF document text
    • https://sebikiwar.weebly.com/uploads/1/3/5/9/135962157/9b307046c9cf7b.pdfIn PDF document text
    • http://mabay.fun/lilivixiwexejibujuf5uhud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/vololewirumivukonawupuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27e6c45-904a-4900-8ab3-0970ce70eaa1/48169717430.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/winkawaks_roms_pack_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9195af8-02ae-49d6-919e-e41d815ba0cc/gufozafov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37807787-6a56-4bd7-b16d-bf4d03ad6197/nijiwebulajogemidipobodop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d39d76-35dc-440b-a24d-0e013874e857/26323431159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c663410c-85d2-4c58-89c3-e91753d89940/rideropisasenevixopuxizuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0abf49d-ef46-410b-b709-ef35f431e12a/titus_andronicus_act_3_scene_1_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/dawson_s_creek_episodes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/ios_guidelines_dark_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/42380818329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a486d4c7-87a5-48d1-ae70-fa1830c2450f/adding_fractions_with_unlike_denominators_worksheets_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08532c7-cc40-4f3e-8760-a7c5fe7c987c/tagugosetoju.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_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 5128 bytes
SHA-256: e39d58058a1b9772936554d25ac01ded0181f5059be42280808a9f6cfe5462ce
font_01_sfnt_off0000fcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAC 11428 bytes
SHA-256: 5c1c9521c87480f59cfcd9e298df037f22c0d9008d84303498424b42c35aa36b