Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1efaeb564be6ce…

MALICIOUS

PDF

77.0 KB Created: 2021-03-12 21:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb3094d53f97bfcc44d70426b30a49d8 SHA-1: 9ee223feedfbdaab53a018e5ec653dcd579647d8 SHA-256: aa1efaeb564be6ce8d5aafa7d686d5961063e741c69fd6d32906ece70694abb9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed and point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=bill+gates+biography+pdf
    • https://cdn.sqhk.co/sevafeluba/kgewNgi/wawulobimejimorote.pdf
    • http://kavademive.sportsontheweb.net/public_relations_job_description_resume.pdf
    • https://zisugopijelides.weebly.com/uploads/1/3/1/4/131438068/lozugoge-minavufunifuzew-domomexi-rotawuvosamuk.pdf
    • https://cdn.sqhk.co/tefozakozup/1gjjeuV/twisted_x_women_s_boots_size_chart.pdf
    • https://jesodiretax.weebly.com/uploads/1/3/4/6/134659119/letimuged.pdf
    • https://cdn.sqhk.co/manizamo/Fhciixo/riretetiluzuguxelibo.pdf
    • http://pobadabodoz.scienceontheweb.net/beginners_guide_to_investing_in_stocks.pdf
    • https://cdn.sqhk.co/dubikureta/ir42jg7/geometry_dash_world_pc_without_bluestacks.pdf
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/bowejorupe.pdf
    • https://nogulakotu.weebly.com/uploads/1/3/0/9/130969216/vivesejonamekoko.pdf
    • http://fudoviwil.mywebcommunity.org/relations_and_functions_worksheet_practice_b_answer_key.pdf
    • https://cdn.sqhk.co/jomonufo/Qhghigh/university_of_miami_football_schedule_tv.pdf
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/d9d5b8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sukedil/azhage_azhage_album_song_hd.pdf
    • https://s3.amazonaws.com/tigewibejageju/tudixumena.pdf
    • https://s3.amazonaws.com/sesafefanulokam/user_manual_for_casio_calculator_fx-_82ms.pdf
    • https://s3.amazonaws.com/gudukupir/280551992.pdf
    • https://s3.amazonaws.com/lovomijelun/biodata_format_in_word_for_accountant_job.pdf
    • http://tiwatimab.atwebpages.com/28523435589.pdf
    • https://s3.amazonaws.com/pavujiniz/investigator_brochure_ich_template.pdf
    • https://s3.amazonaws.com/murudute/because_of_winn_dixie_coloring_pages.pdf
    • https://s3.amazonaws.com/tamovagag/2894240161.pdf
    • https://s3.amazonaws.com/xovekolamoxe/tent_card_template_google_docs.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efde.bin
7908733767512e1549153b18fdae17eb01a755817339b104d481f1238e293be3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 5592 bytes
font_01_sfnt_off000102e2.bin
4622a67b96d5d8932ae9259d9c38547cf36f68364b719715cc99714a6ee08aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102E2 10560 bytes

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