Malicious PDF — malware analysis report

Static analysis result for SHA-256 dada41f68de453c7…

MALICIOUS

PDF

80.4 KB Created: 2021-04-23 17:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7a2c203cf321c16e13c2e3202967259a SHA-1: 253f0e402857658129dc9c2a82de346df19c4035 SHA-256: dada41f68de453c70c3071b93d2b8d29e9d30516a5acc2d1ee04da9cf0a9a955
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URI pointing to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. Although the document body is heavily obfuscated, the presence of external links and the overall detection profile indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://xezojetit.ru/strik?utm_term=what+is+the+difference+between+greenworks+and+greenworks+pro PDF link annotation
    • http://kiritisivasol.mywebcommunity.org/factorising_algebraic_expression.pdfIn PDF document text
    • http://canonsburglake.com/wine_tasting_score_cards6z6p1.pdfIn PDF document text
    • http://phtech.site/dr_eric_westman_ketogenic_diet_food_list14z7n.pdfIn PDF document text
    • http://supfitket.buzz/lullaby_of_birdland_partition_piano48rs6.pdfIn PDF document text
    • http://blancer.xyz/how_to_write_a_literature_review_using_apa_formatx8n5x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_fa38b5432e334f2b80ccae8d3ef37f0c.pdf?index=trueIn PDF document text
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_19ca4795245c45e4a82a0e9ad5f62334.pdf?index=trueIn PDF document text
    • http://wareguw.atwebpages.com/94590600322.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_6c34378702ee4ab09a4478df48df33da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumuzu/syma_x11c_air-cam.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/34126718307.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/lovujogenilenake.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_af924e061ad548a998f1e57884b8ec16.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/40608837585.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/reporter_amharic_gazeta_recent.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/reading_comprehension_worksheets_2nd_grade_free_printables.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/minnie_mouse_pumpkin_carving_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/superdry_ladies_jacket_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/taxadelekuvapujaj.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_a40fb16a38464853997fcb42718f828c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/tamil_cartoon_video_songs_free.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_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 5696 bytes
SHA-256: 57394df2b30f5f47d4567d84ae5776cf2b88258c539b43c88d941c7825dbd0a7
font_01_sfnt_off00010cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC8 11240 bytes
SHA-256: 04521d1416bf30bb35e5395fa64a1ee7aef491a50faacb9ebad7a899c07e563b

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