Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0627d252a68ed8e…

MALICIOUS

PDF

91.7 KB Created: 2021-04-13 07:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e3fca666777f796ab23db50aed0fae6 SHA-1: c073cec57aada8ffcdfc8b55c76cd760d4e2e49a SHA-256: a0627d252a68ed8e55e4bddb80c1509fc00f4b2d513cbf137ae318815b2622e6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://bologen.ru/strik?utm_term=what+does+dystopian+literature+teach+us PDF link annotation
    • http://gromstroy.com/dakegitobesusilixjl0h.pdfIn PDF document text
    • https://cdn.sqhk.co/gesuxafom/7Tgciis/spacex_launch_schedule_november_2020.pdfIn PDF document text
    • http://habirovradik.ru/simple_past_tense_regular_verbs_exercises_multiple_choicezepwc.pdfIn PDF document text
    • http://fasad-dom.site/what_is_a_good_electrolyte_water79a3n.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/cOv8rk5/77013128924.pdfIn PDF document text
    • http://avtoshkola-region26.ru/2010_chevrolet_camaro_zl1_specs7vago.pdfIn PDF document text
    • http://ig-copyrightviolation.com/xasupivalawuxawoxeratnl7k.pdfIn PDF document text
    • http://reduslim-shop.site/alcatel_u3_4049d_manual1ub6i.pdfIn PDF document text
    • http://trixy-matrix.space/lights_out_2016_full_movie_download_in_hindi_480p96lkk.pdfIn PDF document text
    • https://cdn.sqhk.co/xoresarib/hjjjjjD/jowejuwawinum.pdfIn PDF document text
    • http://securityverifiedservices.com/kibunigerekutw2lw.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://furniture21.online/livexifulunaliu1p1p.pdfIn PDF document text
    • http://stebsmeh.space/58464145805tg8ch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_dda714b7bf2b4412b79f820b13eed5a4.pdf?index=trueIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_01769a01a77f4800af6c211acedea629.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08cadd5-0a08-40fc-a028-c89aebc786a3/walimubutadulopuw.pdfIn PDF document text
    • https://bf2b7b75-7790-49a7-81e6-d2546e692b42.filesusr.com/ugd/8ccf63_6ed2e5de182d4211b0cccfeeb8a326ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b9e86d-3d6e-43b7-ae29-47fca846b392/percy_jackson_sea_of_monsters_book_chapter_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/028901d9-deac-4e81-972b-507a35d85525/26747346404.pdfIn PDF document text
    • https://74df6fe0-557b-4e47-8461-f2df536053d0.filesusr.com/ugd/4dcf4e_59a0925e6ec14bfeb66a87eb3b7d203c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba69cc6e-a19e-4b0c-b8ac-7400576e7181/cambridge_ielts_9_listening_test_2_section_3.pdfIn PDF document text
    • https://e19809cf-df80-48c1-9975-8599b001ad7a.filesusr.com/ugd/062cdf_7272e82bacff4c6b8e106418968bb3eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4380caf4-2309-434a-956b-649be1eaf291/what_test_strips_go_with_true_metrix_air.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A50 5160 bytes
SHA-256: 31e5fdc33847b1db2c87c5c07bd16ddef30a3b639dfb00b5b34a80deca05ad65
font_01_sfnt_off00012bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDB 12116 bytes
SHA-256: dd79a6bd1c34460998ad3e1c3d762276c5a42abdf5b4210c50fa4cfbe49dcb2f
font_02_sfnt_off00015336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15336 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333