Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a87c3e17ab5891b…

MALICIOUS

PDF

79.0 KB Created: 2021-03-25 10:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc25a12700ec797e3f31fbb72cf4b7e3 SHA-1: d957462cfd5c14a6e6eb0f8b21e93f3a5985d5bd SHA-256: 6a87c3e17ab5891b8a7dc54402027146ea775128bc991a76555520cdb6638721
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=tectonic+plates+study+guide'. Additionally, a high-severity heuristic indicates a 'Password-protected archive handoff' lure, suggesting the document's purpose is to trick users into downloading and decrypting a malicious payload. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://yafferge.ru/wix?keyword=tectonic+plates+study+guide
    • http://wifunagidoli.mypressonline.com/720625364.pdf
    • https://cdn-cms.f-static.net/uploads/4496812/normal_5fd989543d313.pdf
    • http://setifol.66ghz.com/fp_a_resume_template.pdf
    • https://cdn-cms.f-static.net/uploads/4479942/normal_5fd64c4ced948.pdf
    • https://static.s123-cdn-static.com/uploads/4452395/normal_5ffd20963a01a.pdf
    • https://cdn-cms.f-static.net/uploads/4446776/normal_60323e7087cae.pdf
    • https://cdn-cms.f-static.net/uploads/4365582/normal_60104ca068b8e.pdf
    • http://fejavodexata.getenjoyment.net/topekalaregumujeno.pdf
    • http://nefupanono.mygamesonline.org/dnya_haritas_hd.pdf
    • https://cdn.sqhk.co/mewivupa/hhEjhif/t-_mobile_near_me_hours_of_operation.pdf
    • http://komaxinatobofe.medianewsonline.com/45774795357.pdf
    • https://cdn.sqhk.co/dodalowogiv/iighCE2/dexadaranetitovamazufowov.pdf
    • https://cdn-cms.f-static.net/uploads/4487197/normal_60547c896ce1c.pdf
    • http://xoxapepagaxon.mypressonline.com/mapa_geologico_de_el_salvador.pdf
    • https://cdn-cms.f-static.net/uploads/4386080/normal_605c40d871a56.pdf
    • http://linufiwanekume.scienceontheweb.net/surah_e_mulk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4467004/normal_60579a246acae.pdf
    • https://cdn.sqhk.co/segisaxa/jgijcu6/97558970649.pdf
    • https://static.s123-cdn-static.com/uploads/4446026/normal_5ffd52b286aac.pdf
    • https://cdn-cms.f-static.net/uploads/4410678/normal_5fda06a435740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vilijakuji.epizy.com/jurnal_tentang_boraks.pdf
    • http://tosasip.epizy.com/unlock_rar_password_mac.pdf
    • http://faxiruvud.myartsonline.com/fikadus.pdf
    • http://ritumogadoj.onlinewebshop.net/bcom_syllabus_ignou.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c2.bin
6a82965495b37b485f04dbed63911c4e2f53b3c2134c9ce6a3b0a1495b8beaf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C2 5196 bytes
font_01_sfnt_off00010b91.bin
6988c31779fc93ba3d88f1367400077e29293eeffa7474c17c285ce844958f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B91 10380 bytes

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