Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6cf01dd36d1286…

MALICIOUS

PDF

71.7 KB Created: 2021-02-19 05:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01580d0c53323de901c6c34da61d97e2 SHA-1: 3b612c8be5a76f6f0fc19926fd3e5b0f25f26916 SHA-256: 7c6cf01dd36d1286a034038c31acd19e3bc200d884e00e124b86fbb785ed5bf1
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=answers+to+word+crush+hidden+themes PDF link annotation
    • http://purpless.vip/40201943962cvkj7.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/DShjwgc/vitamix_food_processor_review.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/jje6T0Z/17341828476.pdfIn PDF document text
    • http://praktika-ingenieur.com/3ds_emulator_apkyhh82.pdfIn PDF document text
    • http://rocketdocs.us/space_armor_2_mod_apk_android_12aclv.pdfIn PDF document text
    • http://verifybadgehelp.com/behavioral_finance_questionnairek5mcf.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/U0jfmLJ/photo_lock_screen_password_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/4fF92or/19024417528.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/gcgfBgd/crowdtangle_chrome_extension.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/jgm0gtW/bricks_of_egypt_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446507/normal_5ff3f50643fc2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wefasinufatotag.epizy.com/ps4_emulator_online_android.pdfIn PDF document text
    • http://bexalaxawuwe.rf.gd/huawei_5kw_hybrid_inverter_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/6402633400.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/boilers_thermodynamics.pdfIn PDF document text
    • http://doninedu.epizy.com/62696810731.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/vidmate_apps_install_free_jio_phone.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_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 5016 bytes
SHA-256: e88784490f3536828b5c38dad86785874061af9f9914f68fab77df22bbb37438
font_01_sfnt_off0000ef71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF71 10028 bytes
SHA-256: 3f9d6cecbc2f1455d8529432f943240a29a7cd05dcd0d408479d23c3e6591fcf

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