Malicious PDF — malware analysis report

Static analysis result for SHA-256 19134fbff15ba159…

MALICIOUS

PDF

75.8 KB Created: 2021-03-13 19:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 22982b00ca9891c9bd1b26123e5b9d7d SHA-1: 2229bf94bfd30146bcb65548692aebb348a95732 SHA-256: 19134fbff15ba159b8c29ce8c3c270e5be68e70395738eac7404de166f68365a
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to host phishing content or redirect to malware. The PDF structure and embedded links suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://pelibifir.ru/award?keyword=fda+pregnancy+category+drug+list+pdf PDF link annotation
    • http://lozutapezu.iblogger.org/present_perfect_continuous_questions_and_answers_exercises.pdfIn PDF document text
    • http://mipuruf.22web.org/guidewire_tutorial_udemy.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/dell_optiplex_9020_small_form_factor_i7.pdfIn PDF document text
    • http://glasshookahcatering.com/the_breed_movie_freegms73.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/dryEUhb/63243247414.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/dofipi.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/bihAid7/preppers_guide.pdfIn PDF document text
    • http://banuzatama.22web.org/tuvodivokafiwuzozoro.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/jLGv2L3/dozas.pdfIn PDF document text
    • https://cdn.sqhk.co/zitedefew/ogeNidw/91465763825.pdfIn PDF document text
    • https://cdn.sqhk.co/zitajazasu/eNhJtii/kovetamawaborupozexozofad.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/jfidQih/nefat.pdfIn PDF document text
    • http://pepufur.22web.org/degapirefofodumasuvivibom.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/2KEjhsd/79007266129.pdfIn PDF document text
    • http://yblda.fun/toferapooeby8.pdfIn PDF document text
    • http://novazeku.mygamesonline.org/wevasikebaje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafodix.myartsonline.com/python_convert_ip_range_to_list.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/stative_and_action_verbs_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/vazasamowokop.pdfIn PDF document text
    • http://liwumakagizir.rf.gd/ruzigarakebikegakes.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/what_can_you_mix_with_air_in_little_alchemy.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/durorox.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/juzusuwuzudemidexi.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_off0000ebbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBB 5380 bytes
SHA-256: 097fe6c6610eaca50de14bc02ef71154ca956c90f968e3bdc7e1964ae217709e
font_01_sfnt_off0000fe25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE25 10452 bytes
SHA-256: a6ff4467b82541dbf2e539b1722802918dc9b9575061fa9ddcd1f3c440cb1f11

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