Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7863acf41b65468…

MALICIOUS

PDF

80.8 KB Created: 2021-03-05 06:09:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2c87b6a70a3e34469cd8033288dbb86f SHA-1: b4d1e2b92416a63091c0010d2184ea2803ed6946 SHA-256: f7863acf41b6546857d58981f1b63fcce30c37a409d793de545e957fb54469b8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it functions as a link farm or phishing lure. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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://gimoguvi.ru/strik?utm_term=why+is+pain+bad+naruto PDF link annotation
    • http://galosidijixiwu.mypressonline.com/nojupolutabevasoko.pdfIn PDF document text
    • https://wilulesutazi.weebly.com/uploads/1/3/3/9/133997377/kokub-ruwasoraledod-vinuraze-gurug.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/petsafe_collar_battery_life.pdfIn PDF document text
    • https://sixusiwof.weebly.com/uploads/1/3/1/4/131454093/wunivimunukabo.pdfIn PDF document text
    • http://gijutudubesakuz.iblogger.org/venazebizogarizakix.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://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_c0056e8fd8ed4e78a8b1076bb3e6624d.pdf?index=trueIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_ad7bbf8455d543b485e02ff8176d86d0.pdf?index=trueIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_598fa882778d46bd80e1c22af2aa8355.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/aborsi_menurut_islam.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_777d1b8228124cbe9eaef02ad6691642.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/759bc4d2-d1c6-42ca-9712-1bb626a89dda/35871944531.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/18957168310.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/hypertension_guidelines_2017.pdfIn PDF document text
    • http://visititeralu.epizy.com/what_does_the_boy_face_emoji_mean.pdfIn PDF document text
    • http://pewaxoxepizus.rf.gd/14368250373.pdfIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_110a1d9684344b69971782295f3d2714.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/848f26d2-2f13-470d-aa1b-dad680358faa/oster_bread_machine_model_5821_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/6463322824.pdfIn PDF document text
    • http://gozusufopam.epizy.com/aws_lambda_timeout_cloudformation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219156a4-f556-4f45-ad91-c8e9d0b38869/wamusosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4db4057b-a57b-46cb-93b7-d5e4f2b732e0/2004_dodge_ram_1500_3.7_engine_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e160ba-d464-41bd-9c1f-6dd41fe34dbd/42394608652.pdfIn PDF document text
    • http://xudadadof.epizy.com/damigoxodutemelujuxe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 5036 bytes
SHA-256: 6964c888257aa8f776c349ce620d28c5cc684ed183014c00831d93cee4aef893
font_01_sfnt_off00010398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 10544 bytes
SHA-256: 7c9c12e26cf42ee04a94d68de60b2df9dab5cd492049418821d9500e524ff9a4
font_02_sfnt_off00012799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12799 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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