Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19158928f530809…

MALICIOUS

PDF

96.3 KB Created: 2021-02-21 20:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bfd9004a352e7401d3ee2c467621a5d1 SHA-1: 4c2c95aeafc39018264638ddafdf775ebe54c44c SHA-256: a19158928f5308093dce7ffba347bbcd9f7de51cb03b003e71c740a93bce3b0e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and link farming. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/wix?keyword=quadrilateral+quiz+worksheet+answers PDF link annotation
    • http://dwatches.site/666549968470euxy.pdfIn PDF document text
    • http://itdiscount.pro/parallel_sentence_structure_checker95yhs.pdfIn PDF document text
    • http://hookup153.fun/jrcalc_clinical_practice_guidelines_2019hgvux.pdfIn PDF document text
    • https://dajixogemozuv.weebly.com/uploads/1/3/1/4/131438707/dakurotedosonatowava.pdfIn PDF document text
    • https://gegiritofizupog.weebly.com/uploads/1/3/4/6/134644009/keboxot.pdfIn PDF document text
    • http://teaitalis.space/the_amounts_owed_to_a_firm_by_its_customers_are_calledupc23.pdfIn PDF document text
    • http://zdsshop.top/anonytun_pro_apk_androidpn0eq.pdfIn PDF document text
    • http://cleanup-sale.site/switzerland_map_flagc7zy8.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/graveyard_keeper_la_tinta_y_la_plumachlh2.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/anansi_the_spiderpn4fg.pdfIn PDF document text
    • https://janokapaw.weebly.com/uploads/1/3/4/3/134329878/9617512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/kimixidikogezet.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/66450305921.pdfIn PDF document text
    • http://pirafabitibabik.rf.gd/guidelines_for_irish_passport_photos.pdfIn PDF document text
    • http://xidijunuv.rf.gd/encounter_shankar_mp4_song.pdfIn PDF document text
    • http://raxuwalof.rf.gd/polk_audio_car_subwoofer_reviews.pdfIn PDF document text
    • http://runodeb.rf.gd/background_images_for_photoshop.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/casp_comptia_advanced_security_practitioner_study_guide.pdfIn PDF document text
    • http://kesotufujurox.rf.gd/75573542654.pdfIn PDF document text
    • http://supitemev.rf.gd/best_android_phones_under_30000_in_pakistan.pdfIn PDF document text
    • http://jirizaxewusi.epizy.com/zejawal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D6 5308 bytes
SHA-256: e7dec66838c2d7e67b31ce7fbf8f8e8d8f078f0d091246ee379965b1f1b16f0f
font_01_sfnt_off000137f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F4 11092 bytes
SHA-256: 74833a1d1480dd335ff8f48717554f34f2390c2a35cf1fcf46b97f6fad40614d
font_02_sfnt_off00015ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DDC 16160 bytes
SHA-256: ab862ddcc36e5f8abbcc0ec12f45ee2a0a0017beba85073a80867d3ee452b16b

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