Malicious PDF — malware analysis report

Static analysis result for SHA-256 180099a8fdf8a831…

MALICIOUS

PDF

75.6 KB Created: 2021-04-28 05:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1ebf1b8e9dd9500d2f5a1d4bba5bcb77 SHA-1: 2a0b2eb730683a8b889753ca2767ae345da43c09 SHA-256: 180099a8fdf8a8311682646f95f3a9c6232fd18cd80382c9c87222b914c10440
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to distribute malicious content. The primary URL, 'https://resalured.ru/strik?utm_term=holmes+air+purifier+ionizer+manual', suggests a lure related to product manuals. ClamAV and ML classifiers strongly indicate maliciousness, and the PDF structure itself is flagged for containing mass external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://resalured.ru/strik?utm_term=holmes+air+purifier+ionizer+manual PDF link annotation
    • https://dunegigamirusa.weebly.com/uploads/1/3/1/4/131437715/xuwejikoxajemo.pdfIn PDF document text
    • https://dumuwikodopod.weebly.com/uploads/1/3/4/4/134458554/3787803.pdfIn PDF document text
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/6704758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476437/normal_6048cd5a00057.pdfIn PDF document text
    • https://kevibudoja.weebly.com/uploads/1/3/0/8/130814666/4551361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_601587b616efd.pdfIn PDF document text
    • http://cmbespaceclient.xyz/gikudakosavegezovevejb5885.pdfIn PDF document text
    • http://sukovuxelex.22web.org/benefits_of_social_media_in_education.pdfIn PDF document text
    • https://mufunada.weebly.com/uploads/1/3/4/6/134623537/sitevekuxitas.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/vosave.pdfIn PDF document text
    • http://matras-24.ru/htc_one_m8_battery_price_in_ghanazzc92.pdfIn PDF document text
    • https://bilewemebit.weebly.com/uploads/1/3/5/9/135964156/1c5d44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/17c7dfba-d705-4167-808b-c34039a36b11/nimopofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c489af7b-27da-4ae4-bacd-a5acbe6101e8/vosojonopejuditejodukoz.pdfIn PDF document text
    • http://jugefewaxuxuf.epizy.com/75569614494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1739b6b4-1cdb-402c-88e1-95bd2133de8a/spider_v_20_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02C 4860 bytes
SHA-256: b2d16589f945a7840315273b99f6af2f66caeb37e0570d08a76192c38c487553
font_01_sfnt_off0000f093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF093 10196 bytes
SHA-256: 2f92de7452c2c495a40b00700c850648f218072ea670ebf56f574454e340cb0b
font_02_sfnt_off00011384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11384 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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