Malicious PDF — malware analysis report

Static analysis result for SHA-256 57754b2048ceadd1…

MALICIOUS

PDF

79.7 KB Created: 2021-03-09 15:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 67a3a8ee23b671218709643c6b7ef6c7 SHA-1: 44ca7fe0c97d07c6b9538a933c0e60df0fea597e SHA-256: 57754b2048ceadd155edfd6c4edd63d9da68ea1456e249878ed18e1e51769987
194 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with many links pointing to disposable hosting and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The presence of a download button lure and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The document's content suggests it is a lure for a 'clash of clans hack tool download apk', likely leading to malware or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=clash+of+clans+hack+tool+download+apk PDF link annotation
    • http://gatofupimekow.mywebcommunity.org/45946019475.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/1986729.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/owen_meany_chapter_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503767/normal_6032c8c57cf6c.pdfIn PDF document text
    • https://doxugibako.weebly.com/uploads/1/3/0/7/130776338/6431204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fe66eada5da8.pdfIn PDF document text
    • http://tinyurl.hu/4q22/ClickIn PDF document text
    • http://tinyurl.hu/4q22/ClicIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5895a56-7014-481f-a688-23b0024a4166/bojekojabijelis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37540704-3b77-4115-9978-77e8de7136cf/4706655454.pdfIn PDF document text
    • http://sazebufaz.atwebpages.com/proyecto_de_investigacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2effcdc-152a-43f3-ad19-31457f13847b/durabiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8d5eeb-79b9-4a13-8d06-5a067df42963/jatepikigare.pdfIn PDF document text
    • http://redexini.epizy.com/jenesutijatofozakokazekuf.pdfIn PDF document text
    • http://gevapugono.atwebpages.com/cbre_cambodia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e142749-a937-4697-b53e-492a16581cbe/how_to_answer_job_interview_in_call_center.pdfIn PDF document text
    • http://gopivikanofo.rf.gd/gapolutevudukug.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_off0000fc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0F 5208 bytes
SHA-256: 14b4660032849b89144f70a3d15dd511d925e2e1c4ab806d2c9a2b64caa7a267
font_01_sfnt_off00010dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD6 10440 bytes
SHA-256: 29756e13e7a1b6b34c87fc71cb58ef9725a3f2ab1df882de0734e6860eee570d

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