Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6ac2c5d5e56256…

MALICIOUS

PDF

84.6 KB Created: 2021-04-08 01:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3a642df5ef11f2f1cd4bcd9357575875 SHA-1: dc4817db90f8a37ce9be369cbd264ba73ff314bb SHA-256: de6ac2c5d5e56256ee39847e3f5cd11e1eeaa0187ee26883e58ff1eb3cee2018
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://druttle.ru/wix?keyword=harvest+moon+tree+of+tranquility+guide+book PDF link annotation
    • http://jivumif.iblogger.org/86474481248.pdfIn PDF document text
    • http://lidekuzadapuvi.22web.org/bendy_and_the_ink_machine_mobile_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/91xq4ia/among_us_character_maker.pdfIn PDF document text
    • https://nepikazot.weebly.com/uploads/1/3/4/5/134526085/gavadikogasisi.pdfIn PDF document text
    • https://cdn.sqhk.co/dobulefipuji/ohbCbif/75770565057.pdfIn PDF document text
    • http://rutopadazemed.22web.org/roots_and_coefficients_of_quadratic_equations_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_604692b79cc5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_604cdcc6884d7.pdfIn PDF document text
    • http://rarebuzoxexovom.22web.org/animated_text_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_60262defe4700.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/sakewos.pdfIn PDF document text
    • https://fezawajudew.weebly.com/uploads/1/3/4/8/134896424/nofukinuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_604d60a54f183.pdfIn PDF document text
    • https://kolojadulosa.weebly.com/uploads/1/3/1/3/131397946/6511334.pdfIn PDF document text
    • https://wipegozi.weebly.com/uploads/1/3/0/9/130969535/e87c09293.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/jiwjeb5/1998_musicians_friend_catalog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5ff0a2215c160.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1a73feee-b327-4bc5-ac54-9d367b44a425.filesusr.com/ugd/226baa_370683197be54e44aafd5047d0360474.pdf?index=trueIn PDF document text
    • http://jefevuxivux.epizy.com/roxalipedonekufapigap.pdfIn PDF document text
    • http://ritikaju.epizy.com/nowirefe.pdfIn PDF document text
    • http://gelidug.epizy.com/pelowaj.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_bc7e42cff1344e35b1e8139bd0c1fd0f.pdf?index=trueIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_e1879f7d7484412aa74006d641efdd03.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 5900 bytes
SHA-256: de7de74e475753f845eba03ed13942de50efc81114d2411f16a288f0ec9cf818
font_01_sfnt_off0000ffdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 5564 bytes
SHA-256: 7ea2744ec8edd2cbec22b51642b09b40a4c73f70f0a4c5ce550a8191e7d50d32
font_02_sfnt_off000112a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A9 10340 bytes
SHA-256: 1b8b4ddc7234683599d436af232f2d8feb54767e720f59df1bfa10d35e682d47
font_03_sfnt_off00013602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13602 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f