Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a275a143204c325…

MALICIOUS

PDF

69.4 KB Created: 2021-02-15 18:23:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3eb746bb9359ede94ea125058d5ee177 SHA-1: 56beecc23cf3b6344067995475b27bd4384ddfeb SHA-256: 5a275a143204c325a69f6f9b76358cbd00c386feb94a214c6e1736210a8934bc
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. The presence of numerous external URIs, many on disposable hosting, and the 'SE_CALLBACK_LURE' heuristic suggest a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to Kindle device issues, likely a lure to direct users to malicious URLs such as 'https://maypoin.ru/strik?utm_term=kindle+fire+hdx+won%2527t+charge+or+turn+on'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/strik?utm_term=kindle+fire+hdx+won%2527t+charge+or+turn+on PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480748/normal_600d720398293.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/jfJwxjh/44815486824.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/iigiq9M/knife_crash_game.pdfIn PDF document text
    • https://gajevorotaro.weebly.com/uploads/1/3/5/3/135329880/fomajozusinitap_bedogenudu.pdfIn PDF document text
    • https://baxorumele.weebly.com/uploads/1/3/0/9/130969728/kufuvipodagedel.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/bKhijgA/mint_business_news_app.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/tokire.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufojigox/MgiPthe/78774443016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449183/normal_5fe8c1790fba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5fd17132e01c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426819/normal_6014d4dd8eb28.pdfIn PDF document text
    • http://sorifaj.22web.org/fezenosuxuxixajagib.pdfIn PDF document text
    • http://padojuputiki.iblogger.org/journeys_3rd_grade_spelling_list.pdfIn PDF document text
    • http://bupatinewesep.66ghz.com/46733834190.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaguvigijosev.epizy.com/calendario_mes_septiembre_2018.pdfIn PDF document text
    • http://ganusigesu.rf.gd/icy_veins_wow_classic_mage_aoe_guide.pdfIn PDF document text
    • http://wepinipinalojud.epizy.com/83183308404.pdfIn PDF document text
    • http://nelojodopon.epizy.com/zubufimiwukirepolezafas.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/cute_love_cartoon_images.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/72892014574.pdfIn PDF document text
    • http://gajubizoj.epizy.com/gomim.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_off0000d2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B7 5268 bytes
SHA-256: 11430acc1e86fa548e8fdf06a43935ff684b5f0e2f5f53752c68c277e14c778c
font_01_sfnt_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 10356 bytes
SHA-256: f038ec122ff91319b92003c0dc13a638d53c3fdcbf7731ff0614444ff3c0b743

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