Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8d4ad134b47074…

MALICIOUS

PDF

67.1 KB Created: 2021-03-12 09:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 61f2f2ce68b82e8c7c6cda1b745c03c2 SHA-1: 1712e9683dd53c1d4cea092a1e468b398cd0c197 SHA-256: 6a8d4ad134b470749b302a2dfca3d014bc785f52bcf4decf3e593b98b1830022
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection, indicating malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting it functions as a lure to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a pattern of using disposable hosting for link farms, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/123?utm_term=aster+flower+information PDF link annotation
    • http://lamovingcompany.com/37574874399xcu7o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495246/normal_6039a33417ede.pdfIn PDF document text
    • http://dabinepoj.mygamesonline.org/1266750655.pdfIn PDF document text
    • http://natasisenexu.22web.org/fixed_beam_bending_moment.pdfIn PDF document text
    • http://edalovert.xyz/ruwaxemakomoba5v7rc.pdfIn PDF document text
    • http://jobs-ingenieur.best/litikakizufulosikusubonoysin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_603690b204796.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/91108114103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_603e4b581b285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449599/normal_6010a00c37f0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixikoko.epizy.com/libro_los_5_lenguajes_del_amor_de_gary_chapman.pdfIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_53b656fe3c8a43a69c3de6bdf82fa2d1.pdf?index=trueIn PDF document text
    • http://zunuwovadete.epizy.com/injustice_gods_among_us_apkmonk.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_1c1e1d6836464d539eab6c3aff21bef3.pdf?index=trueIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_caf8a2b4c38345fa9e074c261d8feb3d.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_0b553e1225c84df28c783780a4e93972.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_210c03c889bf4ecfab6943bb20253641.pdf?index=trueIn PDF document text
    • https://fbaba6ab-37cf-477f-82bd-e10a416eccda.filesusr.com/ugd/3c8574_3ab3fa948d8c4d328c925d8bf84e6ae2.pdf?index=trueIn PDF document text
    • http://xakagigoneliv.myartsonline.com/75092827256.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_off0000c9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FE 4992 bytes
SHA-256: e9edc65e086bbb1b961bdd5a58b8924a41214feca1f4f67b24f57974c6e82c48
font_01_sfnt_off0000daf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF2 10860 bytes
SHA-256: debdd224f718d9163f53b5c97060057649e82528f912344ccfc1f16654e0987c

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