Malicious PDF — malware analysis report

Static analysis result for SHA-256 7454b19dbdc6eebc…

MALICIOUS

PDF

156.6 KB Created: 2021-03-15 04:58:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7be956cdc48b93be3ba144922c5add75 SHA-1: 085e540e519d2c8b1cebd65b734d16d39139232c SHA-256: 7454b19dbdc6eebcc10828af8dab55c8fbe2cb7b0d28295e97302554c958c162
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, many of which are associated with link farms and potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9633

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://seumenha.ru/strik?utm_term=el+sagrado+coran+en+espanol+pdf PDF link annotation
    • http://lolkek.xyz/7273075014qdv5j.pdfIn PDF document text
    • http://onlyforyou.space/wufebipobotivituluwiopjdg.pdfIn PDF document text
    • http://fullstacket.online/amazon_kindle_fire_10_salevoul4.pdfIn PDF document text
    • http://sarhello.online/funny_things_to_put_in_a_class_president_speech5a0ho.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/hchhZFW/dragonpass_premier_rbs.pdfIn PDF document text
    • http://bcipreactivaperu.com/acceder_a_la_red_movistar_sistema_androido2u45.pdfIn PDF document text
    • https://cdn.sqhk.co/giwitosak/dvicggb/zombie_day6_lyrics_meaning.pdfIn PDF document text
    • http://linza.media/400003202320pw6e.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/guxujagiruxomovibig.pdfIn PDF document text
    • http://discovljzg.fun/76599472860xxzjc.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/geic9oY/lidapijozaledal.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/kifiwodaramirejej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_c5129b079e0245e19c1e0d53ac11aff8.pdf?index=trueIn PDF document text
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_1b47cf4c1fd243019d30008fb749b67a.pdf?index=trueIn PDF document text
    • http://jisijuvod.myartsonline.com/covid_19_safety_plan_nsw.pdfIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_a870b0964f6b4e179599337bdde6fb02.pdf?index=trueIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_6612e2cdce81458da2a4aff5f3c93a2e.pdf?index=trueIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_355770c5c512453eb66e595d6146b327.pdf?index=trueIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_4eb32ef0265747da810f9229efabec6b.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0002187b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2187B 25568 bytes
SHA-256: b6e350c6e3d2b496fcc836dd1e911a53337bd6da677292b7a227d5aa9041719a
font_00_sfnt_off0001ae8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE8F 3656 bytes
SHA-256: 2f2b3afea2261392e711ed7d472cef7de270fb914e15d65b18282e959d3f219e
font_01_sfnt_off0001bbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBB6 4940 bytes
SHA-256: 1589bfb178dc12a24ef0367f97aeb87b01c1e99c8ffa3be0134ade03f6049db7
font_02_sfnt_off0001cc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC79 8048 bytes
SHA-256: 1693d97fb7b6899784a04dc19f8d289465b74ac5536b740a90b70d6b51882751
font_03_sfnt_off0001e2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2D9 19024 bytes
SHA-256: b60e8a14f19765d90da62b6127aefcd60dcef13cba00fab3dec18c736b448783
font_05_sfnt_off0002448e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2448E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
font_06_sfnt_off0002528e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2528E 4532 bytes
SHA-256: ec94549b51152e545872a0cbf0f0310651adf1df611e42e8ce24a12e06c4439b

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