Malicious PDF — malware analysis report

Static analysis result for SHA-256 a580bb0901fa8001…

MALICIOUS

PDF

80.8 KB Created: 2021-05-07 22:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 868c2e0118bb19467749b90785f66f97 SHA-1: 58d33e6fc87e312073ffef47c1712e216fc8b163 SHA-256: a580bb0901fa80010de753d56b826b51ca66fa5174d98e6b2781e25ee4dec373
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of embedded external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=evinrude+25+hp+2+stroke+weight PDF link annotation
    • http://criticcxck.space/hello_brother_film_all_video_song2qfl4.pdfIn PDF document text
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/0b255c8.pdfIn PDF document text
    • https://vonuvevija.weebly.com/uploads/1/3/1/4/131407152/9648642.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/saludug.pdfIn PDF document text
    • https://wipemaxo.weebly.com/uploads/1/3/5/3/135345075/wofurizezawefod.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/lafizedew-jafalo-tebaf.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/79644903628mhd6c.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/fd370347e.pdfIn PDF document text
    • https://fadurobudafeme.weebly.com/uploads/1/3/5/9/135959894/vusijivi.pdfIn PDF document text
    • https://lupenasax.weebly.com/uploads/1/3/4/7/134738003/72703.pdfIn PDF document text
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/xarurew_gekimef_metobesanotafed_mebavuruvowife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/86aaede8-9662-4a86-a68b-123f883c8b0f/94448885697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adec2b24-b42f-43b0-949f-f362d446576e/the_house_on_mango_street_intro_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/teri_meri_bodyguard_audio_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/funiculi_funicula_sheet_music_choir.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/32909570104.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/acronym_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed0f881d-6c4d-4cfd-b5ea-f9a2b0e94a37/top_10_best_fingerstyle_guitarist_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c372e2e-7094-439d-a694-f8aa2d295dba/apple_ipod_nano_1st_generation_case.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/s_corp_bylaws_template_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_off0000fa88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA88 5408 bytes
SHA-256: c3da2df381e8337db7845c25ef8f37ff944a69ad277eee96102b2bab8a6407a4
font_01_sfnt_off00010d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D08 11668 bytes
SHA-256: 2494542ebf284f48a82c6fd2724969f6b6936ec9d79f6a7d58bf61d29fb9b414

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