Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6af661201761c5…

MALICIOUS

PDF

72.9 KB Created: 2021-01-29 18:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 146c750043b6b28002dc3d49bd1fe864 SHA-1: 889791de5e6861f7c6f4626f7274de76a8539aa6 SHA-256: 7d6af661201761c5668c6a295bcc081a51f94ccf22365c99f01bd1be47b59722
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of many external links suggests an attempt to lead users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://druttle.ru/aws?utm_term=calamari+steak+nutritional+information PDF link annotation
    • http://idealicaitalia-ufficiale.site/vuvexoxuxofkv.pdfIn PDF document text
    • https://lisufijefe.weebly.com/uploads/1/3/2/7/132740260/nejobopibak-pewuxeze.pdfIn PDF document text
    • https://linazigamatamab.weebly.com/uploads/1/3/1/8/131856602/40bd54.pdfIn PDF document text
    • http://antileqphh.site/space_shooter_mod_apk_unlimited_diamond75qsh.pdfIn PDF document text
    • http://yourlivehelp.com/the_aliens_annie_baker_full_scriptvt3wo.pdfIn PDF document text
    • http://sfhgfje5df.xyz/tukikijibaforaze3p5r3.pdfIn PDF document text
    • https://popogupu.weebly.com/uploads/1/3/1/3/131398113/8f2b5.pdfIn PDF document text
    • http://myyshooop227.site/pv49_freebies_meaning_in_tamil6zb8y.pdfIn PDF document text
    • http://limons.space/clicker_heroes_clanto8mt.pdfIn PDF document text
    • http://netzamka.ru/rewafub8qte4.pdfIn PDF document text
    • http://naturaitalia.space/errorless_biology_for_neet_download4l3rf.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/kegajom_volala_zexepadavozaxus_minunazewulow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vazorilumi.epizy.com/championship_manager_01_02_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/kukurevulafijokejenato.pdfIn PDF document text
    • http://dijiwag.epizy.com/isaitamil_movies_2019_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/gikuwunanagetitop.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/kewazolal.pdfIn PDF document text
    • http://doroxokile.epizy.com/ceiling_can_t_hold_us_song.pdfIn PDF document text
    • http://majuditatip.rf.gd/hydrogen_peroxide_10_safety_data_sheet.pdfIn PDF document text
    • http://fiwusinuba.rf.gd/danny_brown_atrocity_exhibition_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/bezorodokizasuropipikis.pdfIn PDF document text
    • http://kujodobiwug.rf.gd/maplestory_ludi_pq_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/vapazakifagaboxop.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_off0000e0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 4884 bytes
SHA-256: 00b6010fbf9d8779659b49cd7a6ef297c8ab6eebf734f7e499d1ec562bd756ac
font_01_sfnt_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 10656 bytes
SHA-256: 44a285cc62715c4277cd107e95354b9d0b1f2deb122d1c0ab17250b5598cceb5

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