Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e322fe5dc0a19c…

MALICIOUS

PDF

77.0 KB Created: 2021-03-12 18:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3f966151655809f3c15b2620399b3b3b SHA-1: d052fa6d4f907b8340b84e469a2a2a117489915f SHA-256: d1e322fe5dc0a19cab8f1c0a3476893be652cd408999cb68ddfbd77e2b59ff24
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a malicious redirector and a phishing attempt, specifically luring users with the promise of an 'iphone 7 plus launcher apk download'. The embedded URL points to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the heuristics and the presence of embedded URLs strongly suggest a phishing or malware distribution scheme, likely involving a secondary payload.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://crophysi.ru/wix?keyword=iphone+7+plus+launcher+apk+download In PDF document text
    • http://nadefememidep.medianewsonline.com/fufosaf.pdfIn PDF document text
    • http://prosale.company/hoover_dual_power_proatbi9.pdfIn PDF document text
    • http://pubggaming.online/helicopter_gunship_strike_hacktc3tn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423136/normal_5fdeae9769165.pdfIn PDF document text
    • http://lagidonak.mygamesonline.org/interview_preparation_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_6027993a00317.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/17115999056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_600bc7538cfa7.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/how_to_fly_a_drone_for_beginners.pdfIn PDF document text
    • http://intekzafast.online/8264384165piind.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/calendario_2020_365.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/matematicas_financieras_capital_concepto.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/mensa_practice_test_results.pdfIn PDF document text
    • http://raisinsapp.pro/gta_san_andreas_cheat_superman_codes_ps2_minigunltdvw.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/juvuraguvutoxif/gusenik.pdfIn PDF document text
    • http://suduxegowur.onlinewebshop.net/how_long_does_it_take_disability_determination_services_to_make_a_decision.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/centralismo_forma_de_gobierno.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/noxuxesorimodo.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/badger_meter_pft_1e_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/philadelphia_movie_songs_free.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_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 5332 bytes
SHA-256: eaf4ecbbea675717291046a19e3507bbb480f3e3165abf840e8b0c76261c5615
font_01_sfnt_off0001016a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 10924 bytes
SHA-256: 358e8fa4e0464be9ce06713fe2ad84e13f37d186177221dcae77a83c5ed13384

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