Malicious PDF — malware analysis report

Static analysis result for SHA-256 280eb443627f83ab…

MALICIOUS

PDF

81.9 KB Created: 2021-03-23 13:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 14d8748e53f40d2a12f938e3d290ef0d SHA-1: 2c70b67ab5819175f5edc0343b89e54961790391 SHA-256: 280eb443627f83ab4f15911a529461e299d5fff6f1bbe7608919f1a46c050dbb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting. ClamAV detected this as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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://druttle.ru/aws?utm_term=the+natural+dog+company+odor+free+bully+sticks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464715/normal_600eb0ad70f09.pdfIn PDF document text
    • http://tameeniraq.com/examples_of_python_programsg3bbh.pdfIn PDF document text
    • http://zootime.store/19219213433a8noz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530036/normal_5fc70e5ee2b9e.pdfIn PDF document text
    • http://astropsychology.site/62780870950bv6m7.pdfIn PDF document text
    • http://hotel-engels.ru/34634623886i5k8v.pdfIn PDF document text
    • http://ekzo-fruit.ru/orbit_irrigation_system_user_manual6svy6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450354/normal_604ad6d3bece3.pdfIn PDF document text
    • http://tokidijafa.22web.org/arithmetic_math_test.pdfIn PDF document text
    • http://shoplus.info/stihl_she_71_electric_blower__vactu9cw.pdfIn PDF document text
    • http://alcexpress3.xyz/koxowalepdx8zt.pdfIn PDF document text
    • http://moneyindia.site/27014165704r2jmq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/miwuropifukikonero.pdfIn PDF document text
    • http://puzenufamem.rf.gd/how_to_connect_motor_siren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62eb1f48-659a-4673-879f-8ac8b95bfe86/help_with_computer_problems_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/ejemplos_de_dialogos_directos_e_indirectos_cortos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514a1786-1f3c-48e2-9f67-667e8f38fef3/kidutuseburomug.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/aoql_ka_full_form.pdfIn PDF document text
    • http://niwuzowebod.epizy.com/gefesewizelesiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/alfreds_self_teaching_piano_course.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 5824 bytes
SHA-256: cad162b1f79db955b0ba2ea28e5f0b62df5795f39d712d4effc55d5569326f46
font_01_sfnt_off00011429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11429 11136 bytes
SHA-256: 5d29d40375dc81674cc512f45d16e5d1960e7466b90fed3804eb66b08da15bb8

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