Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c494b872562cb3d…

MALICIOUS

PDF

86.4 KB Created: 2021-03-14 16:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7748cc786b0ca106d9c33701c7558693 SHA-1: 5c9e9175c20f6b2ebba91250ba5ff2e8567247e8 SHA-256: 2c494b872562cb3d3735336f16dd9f7f5bfcad582787c31c652add58d5c219ea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=baidu+root+apk+for+android+6.0 PDF link annotation
    • http://aycotoro5.xyz/job_interview_vocabulary_words6i68w.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/zopajemiwidenem.pdfIn PDF document text
    • https://babibogek.weebly.com/uploads/1/3/1/3/131379554/mudoranugepiru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464709/normal_5fe0e9906682b.pdfIn PDF document text
    • http://kezijumedet.mypressonline.com/adulteration_and_deterioration_of_herbal_drugs.pdfIn PDF document text
    • https://fibobamoga.weebly.com/uploads/1/3/1/6/131607866/getekeretufi.pdfIn PDF document text
    • http://ninijefaligogi.mygamesonline.org/12006573802.pdfIn PDF document text
    • https://xofanasafavusov.weebly.com/uploads/1/3/4/3/134399160/8d2c4d6469b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_60152955a9001.pdfIn PDF document text
    • http://datab.vip/nejaxufebonifibamuvukaxam1z0n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415769/normal_6017c4ed3f4f0.pdfIn 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/530bac20-1378-47d5-a17c-44b4cc813961/how_does_the_verizon_ellipsis_jetpack_work.pdfIn PDF document text
    • http://pavebutom.epizy.com/jojigumenizivawaruli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c775ac90-65a4-4451-9dbb-fb224bd27264/manual_de_organizacion_y_funciones_libro.pdfIn PDF document text
    • http://kosogomozu.epizy.com/78685374844.pdfIn PDF document text
    • http://tefabawamibane.epizy.com/47794394988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef34284-1ba0-4fc0-be21-96c8417bf07e/99771668380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9fd23b-8bdf-4186-b38a-acdce6064426/what_is_practical_knowledge_philosophy.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 3032 bytes
SHA-256: ac417fa8ded15fda996b4d1a9ad751cd41230f6dc36644c7ad85d12e95d01293
font_01_sfnt_off0000fdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 5264 bytes
SHA-256: 2faa89bc9a04c789bf613ff6bcaccb6147461bbe3415295e859c0639f701d62d
font_02_sfnt_off00010fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB0 10868 bytes
SHA-256: b5641d7a3c74acc85446bcfaa216cc2935e320e7db7e44af409fbd7f6087d750
font_03_sfnt_off00013527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13527 16132 bytes
SHA-256: 60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd

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