Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d910c87d71340b…

MALICIOUS

PDF

75.9 KB Created: 2021-06-02 02:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7c7c12bf8db7599d3daab017aca43f69 SHA-1: f6bf781a2d44a29036494933aacfbd896d6a5636 SHA-256: 36d910c87d71340b70c8b135f7194ec8eee9b30ff798fd82b1a3a48f7362b587
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm designed to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or scamming operations. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://inwebjor.ru/pbw?utm_term=how+to+keep+indoor+motion+sensor+light+on PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426269/normal_605c1183d0e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_5fd9990239186.pdfIn PDF document text
    • https://sadibagisu.weebly.com/uploads/1/3/4/7/134758630/tirexa.pdfIn PDF document text
    • https://xatufatug.weebly.com/uploads/1/3/4/5/134597760/buxefoline_tebixiwodu_kafasadi_zotefamiloz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5fd70bcc3dd2c.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/1f2e90b41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_603160882b2de.pdfIn PDF document text
    • https://miwefotuwid.weebly.com/uploads/1/3/0/9/130969826/7056727.pdfIn PDF document text
    • https://wofogubegir.weebly.com/uploads/1/3/4/7/134728038/8927691.pdfIn PDF document text
    • https://govexofube.weebly.com/uploads/1/3/1/8/131872198/8678912.pdfIn PDF document text
    • https://pupalizote.weebly.com/uploads/1/3/4/7/134716330/wukoguri_zabefonatamaval.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_6065b3e69aa1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425759/normal_5fe0e3ed8f9e2.pdfIn PDF document text
    • https://berijuwijupev.weebly.com/uploads/1/3/1/6/131637896/cb990944663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_606dd4ae9d29f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4417527/normal_60b2b86462f81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446026/normal_5feb126ed09dd.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/6f30d2ff-3930-446c-aa92-f668b166555a/74590914785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1ff0fb-560c-49f3-b68a-4652af0ca1bd/how_to_get_unlimited_money_sims_freeplay_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed15057-acc6-4de2-9067-4a44a0b60341/33718700289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d6da4e-0c0a-455a-972d-6e1806e4dd26/madowebipogakib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/818770cb-fc13-4e77-a2f7-ab4c4eb3ef9f/xibebuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0004d6-9a86-44c8-af81-6ea1ae5aaf8d/how_to_stop_dizziness_while_sleeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43489e0b-508e-4c2e-a68c-4b2e5c1f941e/97026469257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23b9eef-f514-4029-9c7a-1c0bb434a419/how_to_make_z_table_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a37121-b786-428b-9e92-91515628056f/pippi_longstocking_cartoon_characters.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_off0000eae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 5280 bytes
SHA-256: 32b7e55fd44af43601ee2589883f5c7ac1091660014beeb7ac8ff5ba91660b4b
font_01_sfnt_off0000fcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBE 10700 bytes
SHA-256: 1613c5880924ab96b7c634dcb463015970a831ef4a8de333b61bcf2d140ac57e

Open this report in the interactive analyzer, or submit your own file for analysis.